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Versión actual por: Jan Bernert ,

Título:

Blank Screen , Startup Chime but no Boot. Bad CPU or Logic?

Texto:

Hello everyone,

this is about the same PowerMac G4 MDD I asked about before here .. 867 DP .

I did some diagnosing today. This is what I found.

Power On :

Chime sounds, fans go, harddrive on the ATA100 won't spin up when on all other ATA channels it does spin up. Screen remains black. Graphics card is working, tested in other Powermac. No keyboard recognition (caps lock led does noch light up). CUDA / PMU reset performed couple of times, removed the battery for 24h. No change.

With the CPU removed it wont even get to get the fans moving or chime up.

After some time in this state after chime and fans going CPU heat-sink is warm. As are graphics card, memory, some chips on the board.

Conclusion :

Either CPU and/or LogicBoard are bad.

How can I determine which one to replace?

Best regards Jan.

Dispositivo:

Power Mac G4 MDD

Estatus:

open

Respuesta Aceptada:

28781

Editado por: Jan Bernert ,

Título:

Blank Screen , Startup Chime but no Boot. Bad CPU or Logic?

Texto:

Hello everyone,
 
this is about the same Powermac i akedPowerMac G4 MDD I asked about before here .. 867 DP .
this is about the same Powermac i akedPowerMac G4 MDD I asked about before here .. 867 DP .
 
I did some diagnosing today. This is what I found.
 
Power On :
 
Chime sounds, fans go, harddrive on the ATA100 won't spin up when on all other ATA channels it does spin up. Screen remains black. Graphics card is working, tested in other Powermac. No keyboard recognition (caps lock led does noch light up). CUDA / PMU reset performed couple of times, removed the battery for 24h. No change.
 
With the CPU removed it wont even get to get the fans moving or chime up.
 
After some time in this state after chime and fans going CPU heat-sink is warm. As are graphics card, memory, some chips on the board.
 
Conclusion :
 
Either CPU and/or LogicBoard are bad.
 
How can I determine which one to replace?
 
Best regards Jan.

Dispositivo:

Power Mac G4 MDD

Estatus:

open

Aporte original por: Jan Bernert ,

Título:

Blank Screen , Startup Chime but no Boot. Bad CPU or Logic?

Texto:

Hello everyone,

this is about the same Powermac i aked about before here ..

I did some diagnosing today. This is what I found.

Power On :

Chime sounds, fans go, harddrive on the ATA100 won't spin up when on all other ATA channels it does spin up. Screen remains black. Graphics card is working, tested in other Powermac. No keyboard recognition (caps lock led does noch light up). CUDA / PMU reset performed couple of times, removed the battery for 24h. No change.

With the CPU removed it wont even get to get the fans moving or chime up.

After some time in this state after chime and fans going CPU heat-sink is warm. As are graphics card, memory, some chips on the board.

Conclusion :

Either CPU and/or LogicBoard are bad.

How can I determine which one to replace?

Best regards Jan.

Dispositivo:

Power Mac G4 MDD

Estatus:

open