PowerPC :: Sawtooth Graphics - Screen Functional But Display Blank
May 12, 2007
After packing away my little brothers sawtooth 400Mhz with 384mb RAM and an 8Mb ATI AGP graphics card and then unpacking it I've been having a problem. When starting the computer up the screen shows nothing at all I have tested to see if the screen is broken and it seems to be functional. I think the card itself might be broken? BTW, I'm using the VGA slot and not the DVI slot on the back. I have also removed and cleaned the card just incase that might've been the problem.
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Sep 1, 2007
My 2002 iBook G3 notebook with OS X3.9 started acting up on me finally! 2 days ago I turned it on and it sounds like it is starting up normally, but when the screen comes on, it just stays lit up and black - I tried everything, from trying to adjust the brightness, to restarting it a zillion times to completely draining the battery and then restarting it again, nothing seems to work right! I thought it may be the backlight, but then the light does come on, and stays on - the apple logo on the back stays lit up even when I close the notebook.
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Oct 31, 2008
I have a last model G5 with dual 2.5ghz and 4.5 gigs of ram. It also has the 7800gt video card.After I start it up it runs for about 15 minutes and then the display goes blank and the system fans go full out. I've tried resetting the PRAM, PMU, VRAM, all of those things...the last thing I have is the video card to test.Also the power supply was just replaced by a Apple Repair Center under extended warranty.
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Oct 14, 2010
I have a friends macbook. It's circa 2004 according to her. The display look horrible. It looks equivalent to like 8bit windows YUCK. I'm not sure the problem, but it's hard to diagnose (I'm a noob anyway), when I can't see anything!!
Heres a pic
could someone point me in the right direction. I tried searching but it's hard to find anything because I don't know how one might describe this problem correctly.
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May 27, 2007
I have a powermac G4 Sawtooth and the power supply recently decided to go, My question is, is there a way to tell if I have a Rev.1 or Rev.2 just by looking at the board? Markings on the case and PSU don't help because I bought a Replacement Motherboard for it which had wider white plastic clips, I need to know because I am not sure if i need the 237W PSU or the 200W PSU.
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Jan 25, 2009
I'm working on upgrading my 400MHz Sawtooth. I'd like to take it to the maximum 2 GB of RAM, but since I already made the mistake of buying high density instead of low, I thought I'd ask before making another purchase.
As far as I know, these are the right specs for my machine:
-PC100 (or faster) SDRAM
-low density
-non-ECC
-max 512 MB
-double sided
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May 24, 2010
so my pc ftp server starts being a bh so i put all the drives into my pm g4, press power it chimes, screen is blank, i have followed the 'my mac won't boot guide' so please don't point me to that
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Oct 2, 2010
I've been a PC user for many many years, but have had a G4 Sawtooth for about 3 years now, its only a 400Mhz model, but I have just placed a 533Mhz G4 in there, and apparently I need to use a dip switch? I just got a standard sized dip switch, so thats not a problem, I was wondering two things:
1. If anyone has a Sonnet for sale instead of using the G4
or
2. If you can offer up some advice on the easiest way for my G4 to recognise the new 533 CPU?
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Sep 23, 2006
I've got GSA-H20L LG lightscribe drive but the only problem is that the lightscribe drivers I got from versiontracker have to no avail helped me, I also tried disclabel.
Is there anyway via drivers/program to get lightscribe to work on this sawtooth?
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Nov 7, 2006
trying to install Tiger on a 350mhz Sawtooth - problem is the computer won't read the dvd/cdrw drive (it did fine before I formatted the HD). I try holding C, it does nothing, tried reseting PRAM, nothing.
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May 28, 2009
Well, using some guides (check bottom of post), I did some experimenting with my old G4 Sawtooth to see how fast I could run its lame 400mhz cpu. Ultimately, my goal was to make Quake 3 playable at a resolution other then 800x600. These tests were all done with PC-133 ram (896MB), running 10.4.11.
Starting specs:
400mhz (4x100mhz)
Xbench cpu score: 19.9
1st overclock (with 400mhz cpu):
500mhz (5x100mhz)
Xbench cpu score: 29.3
Note: This was incredibly unstable.
In the process of moving to 450mhz on the 400mhz stock cpu, one of the jumper resistor solder pads came off (lame 10 year old glue). So, I went on ebay and got 5 450mhz G4 cpus for 50$ CDN after shipping. One of them came dead, and one failed after the jumper change.
2nd overclock (with 450mhz cpu):
500mhz (5x100mhz)
Xbench cpu score: 22.3
Note: This sucked. Now really stable, but I didn't get a performance gain like I got with the 400mhz cpu, and Quake 3 still ran like crap.
So here I decided to do the FSB overclock. Knowing I would end up with 4.5 x 133 which would be too fast, i jumpered a cpu to 3.5 multiplier for a 466 clock. This never booted. I put in a 450mhz chip and...
3rd overclock (with 450mhz cpu):
533mhz (4.5x133mhz)
Xbench cpu score: 25.6
Note: That multiply doesn't make sense. It shouldn't be 533. But hey, it worked, stable, and I got a performance gain.
4th overclock (with 450mhz cpu):
533mhz (5x133mhz)
Xbench cpu score: 29.3
Note: Ok, the clock is still not right. This is the same cpu that did the 5x100 so I know the multiplier is set right. But hey, its doing better in the scores!
Conclusion: Success! 533mhz seems to be the top out with the NVRAMRC script in place. But there is a considerable performance gain everywhere (booting, app loading, etc). Most importantly, my Quake 3 now runs very smooth @ 1280x1024 with max graphics settings. I am a very happy camper. I can take pictures of the solder job if anyone requests them. I do recommend this if you have some good technician skills.
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Jun 15, 2010
i recently bought a secondhand mac g4/400 and ive been trying to startup to install tiger (am using a macbook pro for work). i tried both of the ultra ata 'bays' but am wondering whether normal IDE drives will work?
i have:
1X western digital (caviar) enhanced IDE drive and
1X seagate normal IDE drive (ST340015A)
the cd-rom works fine on its own and can boot up with panther install discs but when selecting startup disc there is nothing. I connected the cdrom to the far end of the cable (set jumper to master) and WD E-IDE drive to the second 'block' (set as slave)
i am under the assumption that because the cdrom works there is nothing wrong with the cables.
on boot up I cant select the startup drive (just network) as there is only one device detected (CDROM) if harddrives are disconnected
I get the network folder first on boot up then question mark/folder icon
not quite sure how to proceed from here. is formatting a must for the normal IDE drive? or will the mac pick it up regardless.
I connected both drives to existing cables and the normal IDE drive also to IDE (PC) cable also reset the PMU/SMU as well as took out all daughterboards and tested RAM which appears to be ok. i also took out the battery and put it back.
the PSU seems fine, but is there a way i can check with diagnostics or something..
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Sep 30, 2006
I've got a 15in aluminium powerbook, a couple of years old. So far I've had nearly everything go wrong with it. replaced screen, knackered hd, ram port failiure, and a battery that lasts 10 minutes.
I recently replaced the harddrive, as the standard issue one packed up a few times. I followed the instructions on ifixit.com website. To my delight I actually managed to do it, and the pb worked well for a few weeks. Then suddenly, the screen froze and faded to white. So far I've tried everything -
Resetting the pmu. Resetting the pram and nvram. Opened it up to check I reconnected everything.
and checked to see if the hd is still working starting it up from another computer, and it works fine. Everythings still there. Someone also said if you hold 'R' key down on start up it resets the lcd.
BUT STILL BLANK!!!!!!!!!
The screen still seems to turn black after a little while, indicating the energy saver is still on. I'm thinking I may have dislodged an lcd connection or something?
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Jul 22, 2008
So for the first time in over a year since I purchased it, my iMac crashed twice.The first time was this morning, i went to do something and the screen went black, and my secondary display got black and white lines. I had to restart. And the boot screen with the apple logo hung around for a while.
Then, later on the screen went whacky after trying to wake it from sleep (not full sleep just display sleep) and had a bunch of moving lines and then I couldn't see anything. So luckily I got a picture. After restart, it seems fine.I'll call apple care in the morning, but thought i'd try my luck here.
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Oct 28, 2009
I have a MacBook Pro 13 for portability to my classes at the university and a Dell 2209WA as an external monitor. One of the few good IPS monitors I could find around for cheap.
The monitor works fine in mirror mode with the MacBook Pro, but as an external display only it does not work. It attempts to wake up and then you see power savings mode again and the screen goes black as if there was no connection. Not sure what exactly the problem here is. Drivers?
The monitor works great with a Mac Mini I have and it works great in mirror but not in external display mode(the lid of the MacBook Pro closed). Anybody know of this issue? The cable is good and the MacBook Pro is not that old(a few weeks).
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Apr 25, 2010
I running a 400MHz sawtooth Family #M5183 my friend gave me with a 40 gig hard drive running OSX 10.3.9. I just picked up at the swap meet a Qwicksilver Model No.M849 PNG4 1GHZ DP/2M CACHE/512MB SDRAM? 80GB HD DVD-R/CDRW/Nv17 DUAL/56k MDM/GIGE it is missing the HD from under the superdrive can I just plug in the HD from my Sawtooth and run her? She still has the HD in the bottom its a 80 gig IBM Deskstar. When I opened my Sawtooth I found that there is a Seagate Cheetah model#*ST118202LW* Its not even plugged in!!! How many gigs is it and can i run it for more space? I have three 512 cards for memory. Can I use the video card from the sawtooth to run a second monitor? If this all works whats the newest operating system I can run? As soon as I get the money I am going to swap the processor and bring her up to speed. I am a singer/songwriter on a budget trying to put my studio together,I run live sound and make Hand Drums.I'm not a computer tech by no means but I do ok running a mouse to get a good sound. If you are going to tell me to wrap machine in tin foil and put it in the freezer PLEASE don't waste my time!!!!! I just want to build my machine correctly and not f@#$ anything up.
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Aug 23, 2006
I've got an 800Mhz iBook G4 (640MB RAM, latest update for Tiger 10.4) which has worked without a hitch for the last 2 years. Suddenly it has started going dead while in use - the screen goes completely blank (although the backlights are still on) and all sounds cease. It doesn't matter if the machine is idle, or playing World of Warcraft, or encoding a DVD in DVD Studio Pro. It is completely random. The only way to get out of it is to hold down the power button to force it to shut down. Powering up is also becoming difficult - 9 times out of 10 the machine boots but I get no startup sound. Instead the screen stays dark and the fan goes on full throttle, and nothing happens. Sometimes I can force it to shut down by holding down the power button, sometimes I need to take the battery out. When the machine does boot and I get back into OS X, sometimes it displays a message saying my clock and time/date are set before 2001 and I may have problems.
I understand this message comes up if you reset the power management unit, but on checking the time/date it is set correct. I have tried resetting the power management unit, but it doesn't make any difference. I have run the hardware test CD, and all items pass on the extended test. The iBook's battery is almost dead - this I know! But would that make any difference? With the time/date error that sometimes comes up on restart, it's almost like the internal battery that stores data like the time has run flat. Is this charged by the big battery? I haven't booted into open firmware, but I've read I can run the reset -nvram and reset-all commands from there (not sure what they do). It's not hardware, as the hardware test CD works. It doesn't seem to be a software error (although I haven't reinstalled OS X). Has my RAM gone bad or become unseated?
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Nov 1, 2007
So my quicksilver has been working great up until this afternoon. i had to restart and now whenever i turn it on all i get is a blank grey screen and nothing else. i dont hear a startup chime or anything.
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Mar 12, 2008
I came home for lunch today, and found my Mac Mini G4 with the fan running, and a blank screen. It was obviously locked up. System has 10.5.2 with all of the latest updates. This is not my primary system, I have an MBP for that.
Here is what I did:
Force a power off/on, and I get the normal gray screen with the Apple, and spinning gear, but it never stops spinning.
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Oct 26, 2008
I have a G5 that has started intermittently booting up with a totally blank screen - not blue, no video at all. Sometimes on reboot or after resetting the PRAM it works again.
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Sep 20, 2010
I want to do this to increase the speed of my sawtooth. I think that the dual 500mhz was the last apple processor that is compatible with the sawtooth because they both run on 100mhz busses, correct?
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Feb 12, 2007
I have an old sawtooth and like many people find the prices of the original airport card to be a bit inflated.
I read that lucent Wavelan silver, bronze, gold cards are backwards compatible with the original Airport specs.
Does anyone know if this works for certain? If it does, I'd like to pick one up cheap from ebay and stick it in my Sawtooth.
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Aug 14, 2006
I have had my g4 for about two years and all of a sudden the thing decided that it's not going to turn on anymore. Power is getting to the machine and a certain amount of whirring is heard but not the signature! as it starts. The screen remains blank and would stay like that all night if I let it. The only thing I did differently before this appeared was to take it to work in a different bag a few times. Rucksack before, Side bag (more vibration).
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Nov 14, 2007
Today I was planning to build in a second harddrive into my old G4 tower. So I did this. But after installing the system won't boot anymore from the OS X Tiger partition. I have tried all sorts of jumper settings, from slave to master to cable select. All without success.
When I boot from the Tiger installation CD diskutility does not even recognize my original master drive nor does it recognize the new slave drive. I even tried to boot from an old OS9 disk to initialize the disk. I tried formatting it in another machine to HFS Journaled, no success in booting mounting the disk whatsoever.
I recently added some extra RAM's but i doubt these are the problem since my machine DOES boot without having the new disk installed in the system.
It is a 60GB Maxtor drive, so it is within the maximum amount of GB's possible for these older machines.
[URL]
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Oct 4, 2008
I just bought a powerbook, and I'm trying to get it to turn on. It doesn't have a hard drive, so obviously it won't be able to get it to boot. I just want to be able to get to the flashing folder. When I press the power button, the computer does nothing, not even the fan spins. The only indication I have that it is on is the caps lock light turns on. I've tried resetting the pram, but the screen stays blank and does nothing. I don't have any ram modules in it, so it shouldn't be a ram problem.
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Nov 22, 2008
I purchased a used ibook from owc in January and have had it back to them twice for repairs. Lately, it stopped booting up again and they told me to use [URL] to take the mobo out and ship it to Arizona to have the solder refloated. I did and got it back, put it together and it would boot up, only to run for 15 minutes and shut down. Thinking I missed something, I dissasembled it today and reassembled it. Now it turns on with a blank screen, the fan runs on high, and it will go no further. I tried to reset the power manager, reset the p-ram, the hard drive is only a few months old and my brain is getting fried with frustration.
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Jul 15, 2008
so i go to turn my imac on tonight and it makes the normal noise when it always turns on but the screen stays blank(light blue)....after about 2 minutes this little picture of a folder with a question mark shows up in the middle of the screen. it keeps making this clicking noise as well. ive tried unplugging everything and restarting it here is a pic of what the thing that pop ups looks like [URL]
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Oct 3, 2007
My second problem with my PowerBook G4 DVI 667Mhz is that the screen goes about a half inch off the right and bottom of the display. So unless I position the dock on the left, I can't see it if it's placed on the bottom or right of the screen. I also have to drag any icons that show up on the right of the screen to the middle because I can't see them except for their very edge that appears on the screen. This has happened with OS X 10.3, and still after I installed OS X 10.2.
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Mar 26, 2008
Can someone confirm if an Imac G5 will display on a second screen from startup or does the OSX have to complete the boot process before the second display will work.
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Mar 24, 2008
I have an iBook G4 which I want to use with a widescreen external display. I am not interested in gaming or doing anything fancy just surfing the web and working on documents and maybe looking at movies. I already have a hack that enables me to use a regular display which doesn't mirror the iBook screen. I just wondered whether I would encounter problems using a wide screen display and what the maximum resolution I should look for.
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