PowerPC :: Using 20" IMac G5 ISight Logic Board Unable To Power Up

Feb 25, 2010

I've got a 20" 2.1GHz iMac G5 iSight on my bench that doesn't power up.

I've tracked down the issue to a grenaded IC on the logic board.

The IC is an 8 pin SOIC chip, to the right of the power connector, just above the ALS connector. It is labeled UE300.

If you know what this guy is, can send me a good picture of one, or can provide me with the numbers from the IC, I can get this mac back to life.

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PowerPC :: Replacing IMac G5 ISight Logic Board

Jan 22, 2010

I've recently been having problems with my iMac G5 iSight after downloading iTunes 9. After a series of freeze-ups, i noticed a visual anomaly appear on my screen. Little hash-marks all over the display were present, and playing DVDs or iTunes visualizer would result in a checkerboard pattern. After doing some research, I found out this was a logic board problem, and it was not uncommon for iMac G5s. However, I kept using my computer for a few more months when it then started freezing two minutes after boot up. I figured it was time to open up the computer and take a look. But after spending the 3.5 hours opening the machine, removing all of the cables and screws, I couldn't find any visible damage on the board. No swollen capacitors like everyone was complaining about. The only strange thing I saw was some discoloration on a few circuits near the USB and Firewire outlets.

I've decided to replace the logic board myself for around $370, and I was wondering about a few things.
1. Would the new logic board come with a processor, or would I need to pry it off of my old one, and re-attach it?

2. Would I need to go through a lot of re-programing and software issues if I replaced my logic board, or would it just start running right off the bat after replacing it?

3. Is this operation worth it? Because I have come to like my iMac after 5 years of use, and I would like to know if fixing it would give me a decent amount of usage before I would simply need to replace it

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Dec 7, 2010

I can't seem to figure out how to remove the logic board from a G5 w/iSight that I've been given to have a look at. What happens is that the unit powers on, the LCD display slightly brightens (getting power) but stays dark, and that's it. No beeps, boops or other responses beyond that. If you remove the RAM chips, the LED power lights gets mad and blinks at you, but that's about it. On the board itself I get the two diagnostic LEDs lit. The third never even flickers.

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Apr 2, 2010

I just bought a new Logic Board for a 1.25Ghz eMac and I've put almost everything back together after installing it until I ran into a problem. The power button cable that runs from the power button on the casing into the logic board has no connector on the Logic Board itself, now I have an old logic board that whilst being broken has a connector on it but I really don't want to have to solder the connector on for fear of breaking the logic board.

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PowerPC :: Power Button Cord Connector Broken Off EMac Logic Board?

Nov 28, 2009

I was attempting to replace the hard drive in my eMac, but for instructions I HAD to follow some darn take-apart guide that said pull out the connection for the power button cord from the logic board. I didn't know that it was SOLDERED in there, and now I can't complete putting my eMac back together without doing so.

Can this be fixed without having to send it to Apple? Does it HAVE to inolve soldering, or is there an alternative? Is there a way I can temporary have my eMac power on until I get the connector fixed?

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PowerPC :: What To Do With A G5 IMac And A Bad Logic Board

Jun 26, 2009

As the title implies, I've got 3 year old G5 iMac sitting as a paperweight at my desk. At least half that time ago the logic board died and I was quoted a repair bill of around $900. I couldn't go with it, but I couldn't decide what to do with it either. I now have to get rid of it and since I know that this model had lots of issues with logic boards I'm hoping some of you will have some good advice.

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PowerPC :: IMac G5 Logic Board Replacement

Mar 3, 2008

My 17 inch iMac G5 1.8ghz seems to have died. For a while it's been refusing to power up and then powering up randomly but now it wont power up at all. I've looked on the logic board and reset the SMU etc but I can only get the first LED to light up. I think this means the logic board has died. Is it worth replacing the logic board and can it be done easily myself? Or should I just bite the bullet and pay out for a new alu intel iMac? I'm in the UK btw, any ideas on logic board prices?

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PowerPC :: Cost Of Replacing IMac G5 Logic Board?

Feb 11, 2006

My iMac died a few days ago. I shut it down the previous night, and then in the morning when I went to turn it on, nothing happened. The screen display doesn't turn on, nothing. I opened it up and did the LED tests, and found that the first one would turn on, but none of the others would. The apple site says to take it to a store and have it fixed.

Now, I bought my mac on December 19th, 2004 ( what a day that was). At the time, I didn't think I'd need to buy applecare or anything. So about how much do you guys think it would cost to replace the logic board? And also, how long would it take to have it replaced?

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PowerPC :: IMac G5 Won't Boot - Logic Board Error Detected

May 17, 2007

I have an imac G5 20" that is approximately two years old. About 2-3 weeks ago it started acting a bit flakey....it would lock up on std apps (firefox), it would always lock up after being revived from sleeping etc. I ran the hardware test and everything checked out. Then a few days ago it wouldn't boot. I get the chime, I hear the drive spinning, then the fans kick into high gear and I get a screen with a folder in the middle with a "question mark icon" and a "finder icon" displaying alternatively inside the folder. So I booted up the hardware test dvd and the test failed 27 seconds in with the following error code:

2GMC/2/15: built-in
Logic Board Error Detected

Are there any other steps I should be taking before taking in for service?

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MacBook :: Replacing C2d Logic Board With Cd Logic Board Cause Heat Sink?

May 13, 2008

so i've got a system with a fried c2d board. i can pick up a cd board for $150 plus shipping which is good for me. to find a comparable replacement, i'm looking at ~350 and i'm just not feelin that price as im on a budget.

i'm not concerned about the speed decrease as im just trying to get this thing rebuilt.

i understand that there are different heatsink assemblys..vertical vs horizontal. however, i do not know how to tell the difference and i am also unsure whether or not my c2d heatsink will work on this board i receive.

the logicboard possess a t7300 c2d and model # is 820-2279-a, it appears.

i cant find anything on that model, except for on ebay.

and i totally cant find the serial number on this macbook. under the battery on the tray has no serial number listed, and i've read through this documentation [URL]

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Power Mac :: G4 Quicksilver Logic Board RED LIGHT?

Mar 12, 2012

I've been using my pmg4 for a while, just recently I noticed that there is a red light located on the logic board on corner of processor heatsink and ram boards. this light is active during when the computer is on. the computer did not misbehave but is it trying to say something? is this normal operation?

Info:
Mac Pro, Mac OS X (10.7.2), MacBook Pro 13.3 | Logic Studio |

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Power Mac G5 :: Dual 2.0GHz G5 Logic Board - Drive Controller

Nov 14, 2007

I have a dual 2.0GHz G5 that's refusing to boot consistently/run consistently. Here are the symptoms:- Runs for inconsistent period of time; sometimes it hangs just after logging in, other times it hangs after an hour or so of backing up the boot drive (50-75% complete)- Fails to boot after hanging; sometimes it stops at the gray Apple screen without a wait icon, sometimes it stops at the same screen with wait icon, other times the screen stays black- Frequently will not boot into single-user mode- Frequently will not allow you into open-firmware

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PowerPC :: G3 To G4 Logic Board Swap?

Sep 19, 2010

Would it be possible to get a logic board with a 1.33ghz or faster processor out of a 12.1" G4 and swap it in to a G3? Are the parts even compatible? I know from building engines that certain years and parts are interchangable but I don't know about computers.

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Jan 6, 2011

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PowerPC :: IBook G3 And HD Or Logic Board

Oct 23, 2007

I'm looking fore some help/opinions on a friends iBook G3 800/30GB/256MB/10.2.8the problem is- when you press the power button, it powers on and you hear the (all is ok) chime. now sometimes it will boot perfectly fine and others you get nothing, just a blank screen.Now i know these things were notorious for logic board failure, but could this just simply be the HD, and if it is, how easy is it to change.

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PowerPC :: IBook G3 Logic Board Went Bad

Feb 29, 2008

How do I fix it? I assume the Repair program is expired, so how would I go about fixing it myself?

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PowerPC :: Used Powerbook With A New Logic Board?

Mar 6, 2008

I'm still working on this deal to buy a used 12" PB. The seller says that she just replaced the logic board, hard drive, and battery. Now, I see this as a negative. Obviously the computer was having problems, she spent a bunch of money fixing it, and is now selling it anyway. What do you think? Is it a negative that it had problems and needed to be fixed? Or is it a positive that it has a brand new logic board that will theoretically last longer than an original one?

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PowerPC :: PowerBook MBP Logic Board? - G4

Jul 6, 2008

I bought my first Mac (iBook) last December. However, it is now dead from logic board failure. I was looking at Macbooks but they are very expensive, which is why I bought the iBook in the first place. So now I'm looking at 15" PowerBook G4. My question is: If having a G4 proves too difficult in the next few years (PowerPC compatibility and speed), could I put a logic board from a 15" MBP in the PB?

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PowerPC :: Is A Powerbook G4 With A Bad Logic Board?

Jul 30, 2008

I am thinking about purchasing this PowerBook and getting it fixed or reselling it. What do you think?

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PowerPC :: Hard Drive Not Working / Logic Board Unable To Communicate With Hard Drive

Sep 9, 2009

My PowerBook G4 (Alum) died. I've had it for 4 years, taken it with me to Alaska and all over the lower 48, and have had nothing but happy experiences. I knew she was gonna go, but I was hoping she'd hold on until I could afford a MacBook. Alas, no. The problem appears to be the ability of the logic board to communicate with the hard drive. I can hear the HD spin, but even with Disk Warrior, I cannot locate it. The Mac Geniuses at my local Apple store confirmed this and gave me a shoulder to cry on. I've run Disk Warrior, Disk Utility, and tried finding it using the target disk mode - no luck.

The problem is that I've got 4 years of teaching materials, 6000 songs, and irreplaceable pictures on the HD, so I can't bring myself to just trash it. It's true that you only fail to back up you stuff once. This is my once. I've heard that with PC hard drives, you can just drop the old HD into a USB HD box and use it as an external HD. I can't afford professional data retrevial, and I want to give this option a try if it'll work with a Mac HD. Any ideas or suggestions?

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PowerPC :: MDD G4 167mhz Logic Board Processor

Oct 3, 2006

I am looking for a motherboard and possibly processor for a MDD g4 powermac. I need the 167mhz version, rev with dual firewire 400 ports. Also, possibly a dual 1.25ghz processor module. I have either a dead processor or motherboard in this machine and I am having trouble finding some used replacement parts.

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PowerPC :: Honoring Logic Board Switch Out?

Oct 29, 2006

I've got a 900mhz G3 iBook that my wife uses. The logic board was replaced on it once already. It's really starting to act up again. I see Apple is still honoring their Logic Board switch out. What are the chances they'll upgrade it to a G4 or a macbook ? Has any recently sent there iBook in for a logic board replacement? How'd it go, how long did it take?

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PowerPC :: Logic Board On A Ibook G3 700Mhz

Apr 6, 2007

Can you put a 800Mhz g3 logic board in 700Mhz g3? I read somewhere that I will have grounding issues. Is that true? Has anyone done this? My ibook has been sitting here unused for the last 4 months and I would like to see if I could get it working. (The video chip has died and I have tried to get it back)

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PowerPC :: Fix IBook G3 Logic Board Options

Jul 11, 2007

my G3 iBook's logic board has died (it was in that series that had the logic board problem). I had it replaced once already when it was under warrenty. However, the second one has died and Apple will not touch it (unless I pay something like $350 for Apple to fix it). Well, I decided to take matters into my own hands and I ripped open my iBook piece by piece. Now that I have the logic board in front of me, what can I do to fix it? Can I sodder something? Should I take it out and buy a new one off ebay?

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PowerPC :: G5 Logic Board EEE Code Compatibility

Mar 27, 2008

I'm obviously new with Power Mac G5. I have two different logic boards for a Power Mac G5. The EEE code and part numbers are as follows:

Logic Board 1:
EEE Code: SML
Part Num: 661-3585
Other Num: 630T6907 (I don't know what this number signifies)

Logic Board 2:
EEE Code: SMJ
Part Num: 661-3584
Other Num: 630T6906 (Again, I don't know what this number is for)

My question is this; what configurations can I use these boards as replacements in? I'm looking at 3 PowerMacs right now but none have matching EEE codes. I listed the EEE codes and the type of machine they are below.

PowerMac 1:
EEE code: Q5M
Single 1.8GHz G5, 1GB Ram

Power Mac 2:
EEE code: ROR
Dual 2.5GHz G5, 1GB Ram

Power Mac 3:
EEE code: Q6E
Dual 2.0 GHz G5, 4GB Ram, Bought in late 2003

So, if it is impossible to use these logic boards as replacements in any of the above mentioned systems, which systems are they actually good for? I understand there may be system bus speed differences for one. But is there some sort of reference for these EEE codes such as a table or chart? Or possibly a compatibility list or description table with features for each board?

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PowerPC :: Logic Board Replacement For Emac G4

Sep 29, 2008

I have an emac, g4 with a bad logic board. Does anyone have any idea what it would take to replace this and the estimated cost?

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PowerPC :: Take Logic Board Out To Get Optical Drive?

Jan 8, 2009

I picked up a 12" PB for 160 USD today. It had a bad battery and noisy and seemingly non functional optical drive, stock configuration. Looked like someone tried to open it up and failed to put back one of the hinge screws. I believe this is causing a green line (crimp in the video cable) on the screen. My question is: I have never replaced the optical drive on one of these. I bought this for a friend whose ibook died and he has a nearly brand new dual layer ATA superdrive in it that I can replace into the Powerbook. I knew this was daunting. Then I really just looked at the ifixit steps and yeah, you have to dismantle the WHOLE computer. There are 46 steps to replace the optical drive. Has anyone attempted this? I don't understand why you have to take out the logic board to get the optical drive out? On the upside, the near dead battery is eligible for the replacement program, so Apple is sending a new 125 dollar battery. Sorry I am rambling, just freaked at how much work it is to put a new optical drive in these things. Major surgery. someone on MR said they did it before.

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PowerPC :: How Much Is A G5 With Broken Logic Board Worth?

Nov 11, 2009

I brought my powermac into the apple store to confirm what I already thought - the logic board on my g5 is done.I'm putting it up on CL with full disclosure, but I was wondering what I should ask for it? Here are the specs, what would you pay?

powermac dual 1.8 g5
2gb ram (512x4)
80gb HDD
ATI Radeon 9800 XT 256mb
superdrive

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PowerPC :: G5 Freezes / Dead Logic Board?

Jun 7, 2010

Having built a hackintosh with my son, I've taken his old G5 1.6 to use as a desktop. Lovely being able to use dual screens, usefully quicker than my Powerbook G4 1.5 and generally quick enough to do the usual - mail, browsing etc.

Problem is, it's started freezing roughly once a day. No mouse or keyboard reaction, going into standby by using the monitor button doesn't help, the only thing to do is turn it off using the front panel button.

I put new RAM in a few months back and replaced the HDD when it died, so that stuff should all be OK. Any suggestions? I've run all the usual maintenance things via Onyx - permissions, logs, daily / weekly / monthly scripts and so on.

My big concern is obviously that I don't want it to just die on me; no way am I replacing the logic board if it goes.

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PowerPC :: G4 Logic Board Fried - How To Get Data Off Drive

Aug 3, 2006

The logic board on my powerbook (aluminum)G4 is fried. I would like to get the data off the drive, but would like to do it myself. Will the drive plug into an external carrier rig like any other drive? I have a granite digital external firewire drive caddy rig. I assume that the mini drive in the powerbook will not plug into an enclosure that was made for a regular drive? Are there any adapters for this sort of thing?

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