Imac G4 - not booting

[redhatcode29]

Hi Guys,

Just a couple of hours ago, i snatched the below iMac G4 1.0Ghz. It was a faulty set. Last year i missed a fully functioning set. Took a year to come across another iMac G4. So i ddnt bother if it was faulty !

# When it is switched on, i can hear the fans spin, can't hear any sort of HD spin though.

# nothing in the screen too.

# I've never peaked into a iMac G4, so, before i begin,,, any guides, do's and dont's would be appreciated.

# if its goin to be the logic board, hmm, then, it will be a paper weight for time being. But, how do i define if its the logic board..

# if there are any exisisting similar threads, kindly point it out..

Cheers.

 

[DZ/015]

I've never owned or worked on the G4 iMacs, but here is the service source docu for the usb 2.0 models. It should help you out with disassembly and testing.

 

[jaydennz]

Hi,

I had exactly the same issue as you and wasn't able to solve it, here is the thread I started for advice

https://forums.macrumors.com/threads/1760106/

 

[redhatcode29]

I've never owned or worked on the G4 iMacs, but here is the service source docu for the usb 2.0 models. It should help you out with disassembly and testing.

Hi, thanks for your reply and the link. I will check it out.

----------

Hi,

I had exactly the same issue as you and wasn't able to solve it, here is the thread I started for advice

https://forums.macrumors.com/threads/1760106/

Hi, not solved huh....dear, I hope there is some hope!

 

[fhall1]

search on youtube and ifixit for iMac G4 teardown/upgrade videos....there are a lot out there....after watching a few I had no problems opening up and upgrading both an 800MHz and a 1.25 GHz model....but I've also been building/repairing PCs for over 20 years.

 

[redhatcode29]

search on youtube and ifixit for iMac G4 teardown/upgrade videos....there are a lot out there....after watching a few I had no problems opening up and upgrading both an 800MHz and a 1.25 GHz model....but I've also been building/repairing PCs for over 20 years.

Hi thanks for your reply.

Ifixit, true i had once depended on that site for a Powermac. U tube will have a lot of those... i was trying my luck here, if anyone had a similar situation as mine and had fixed it.

Will check it out.......ahhh u managed to fix yours huh. Good for you! But i guess the experience you have is certainly a plus point.

 

[redhatcode29]

I've never owned or worked on the G4 iMacs, but here is the service source docu for the usb 2.0 models. It should help you out with disassembly and testing.

I just took a look at the Dropbox link which u gave, it seems to be a very good guide...200 pages !

Thank you so much.

 

[fhall1]

Hi thanks for your reply.

Ifixit, true i had once depended on that site for a Powermac. U tube will have a lot of those... i was trying my luck here, if anyone had a similar situation as mine and had fixed it.

Will check it out.......ahhh u managed to fix yours huh. Good for you! But i guess the experience you have is certainly a plus point.

I didn't have to fix mine per-se, they were both in working condition. For the 800MHz I upgraded the RAM to 1GB (max it'll take) and replaced the existing HDD (5400RPM 60GB??) with a 7200RPM 120GB drive. For the 1.25 GHz I max'd the RAM to 2GB, replaced the PRAM battery, and replaced the spinning HDD with a SSD. While the cases were open I took the opportunity to clean out a decade worth of dust. Make sure if you take them apart you have thermal paste on hand....you'll need to clean off the old paste and re-apply new before buttoning them up or they'll overheat.

 

[redhatcode29]

I didn't have to fix mine per-se, they were both in working condition. For the 800MHz I upgraded the RAM to 1GB (max it'll take) and replaced the existing HDD (5400RPM 60GB??) with a 7200RPM 120GB drive. For the 1.25 GHz I max'd the RAM to 2GB, replaced the PRAM battery, and replaced the spinning HDD with a SSD. While the cases were open I took the opportunity to clean out a decade worth of dust. Make sure if you take them apart you have thermal paste on hand....you'll need to clean off the old paste and re-apply new before buttoning them up or they'll overheat.

Ic,,,

* Yeah the dust, i can already see that mine is full of it ..ha ha
* about applying the thermal paste, this is for the processor right..
* i thought that the processor was soldered to the mobo for this model (not sure though)
* either way ill have to be extra careful when i disassemble it...just hope i can rectify the issue..
* will be needing more guides...

Thanks..

 

[jbarley]

Ic,,,

* about applying the thermal paste, this is for the processor right..

No, it is used to reseal the 2 heat pipes.

 

[redhatcode29]

No, it is used to reseal the 2 heat pipes.

Oh! Ok,...