Hi. (Jus copy'pasting my questions here from another forum).
Yesterday I got a new logicboard for my imac g4 1ghz 17". I inserted all the cables and turned the mac on while it was still open. The computer ran fine. I then put the bottom on and turned the machine up right and turned it on again, and then it just started freezing. First it would do it after booting up more or less completely, then when I turned it on again it wouldn't even get to the desktop, and then it would just stay black, right after the BOIIING!
I then turned the iMac over, opened it again and started it (albeit after sometime) and it ran fine. I surfed a bit on the internet and everything seemed to be okay. I then rechecked the thermal paste (some spots weren't covered, so I applied more without killing it in paste), put the bottom back on, rebooted it and boom! it froze again.
It just seems really wierd that the machine crashes like this, and while I haven't let the computer run for something like 30mins while open (I'm a bit afraid of having it running while being open), it's just wierd how it dies when everything is in place.
I've tried changing the battery, reset everything possible and I'm fairly certain that the logicboard is in order, so while it could be the powersupply it seems to me to be related to the heat.
I did at some point take everything out of the imac (I bought another logicboard at some point which was the wrong model (seller didn't advertise correctly)) to see if anything else was wrong. Could I have done anything to block something related to the heatsink?
AND THEN:
I've tried running it open for some time and it more or less works. Well I tried installing a fresh version of Tiger on the machine, but then the installation died. It might be a dead harddrive, but when I tried the Apple Hardware Test cd, it told me the drive was okay.
Anyway the computer is crashing to a unix prompt telling me of a memory error something like this:
invalid memory access at *SRR0: 00b0027 *SRR1: b002700
* = a sign I don't understand.
I've tried replacing the memory blocks three times.
I tried removing the harddrive completely (it is messed up and wont work with any installation cd), the situation is like this with no harddrive:
The original 10.2.3 crashes with stripes over the screen at the apple logo or a kernel panic screen.
The tiger install cd works with the wonky harddrive removed.
Apple Hardware Test still crashes with the same error message after making all the flickering with colors in the vramtest:
invalid memory access at *SRR0: 00b0027 *SRR1: b002700
What could be the problem?
I'm completely sure that it's the right logicboard, or else it would work at all or let me boot it up.
Is the graphics adapter dead?
Yesterday I got a new logicboard for my imac g4 1ghz 17". I inserted all the cables and turned the mac on while it was still open. The computer ran fine. I then put the bottom on and turned the machine up right and turned it on again, and then it just started freezing. First it would do it after booting up more or less completely, then when I turned it on again it wouldn't even get to the desktop, and then it would just stay black, right after the BOIIING!
I then turned the iMac over, opened it again and started it (albeit after sometime) and it ran fine. I surfed a bit on the internet and everything seemed to be okay. I then rechecked the thermal paste (some spots weren't covered, so I applied more without killing it in paste), put the bottom back on, rebooted it and boom! it froze again.
It just seems really wierd that the machine crashes like this, and while I haven't let the computer run for something like 30mins while open (I'm a bit afraid of having it running while being open), it's just wierd how it dies when everything is in place.
I've tried changing the battery, reset everything possible and I'm fairly certain that the logicboard is in order, so while it could be the powersupply it seems to me to be related to the heat.
I did at some point take everything out of the imac (I bought another logicboard at some point which was the wrong model (seller didn't advertise correctly)) to see if anything else was wrong. Could I have done anything to block something related to the heatsink?
AND THEN:
I've tried running it open for some time and it more or less works. Well I tried installing a fresh version of Tiger on the machine, but then the installation died. It might be a dead harddrive, but when I tried the Apple Hardware Test cd, it told me the drive was okay.
Anyway the computer is crashing to a unix prompt telling me of a memory error something like this:
invalid memory access at *SRR0: 00b0027 *SRR1: b002700
* = a sign I don't understand.
I've tried replacing the memory blocks three times.
I tried removing the harddrive completely (it is messed up and wont work with any installation cd), the situation is like this with no harddrive:
The original 10.2.3 crashes with stripes over the screen at the apple logo or a kernel panic screen.
The tiger install cd works with the wonky harddrive removed.
Apple Hardware Test still crashes with the same error message after making all the flickering with colors in the vramtest:
invalid memory access at *SRR0: 00b0027 *SRR1: b002700
What could be the problem?
I'm completely sure that it's the right logicboard, or else it would work at all or let me boot it up.
Is the graphics adapter dead?