You probably won't need an ESR meter to test the capacitors in the LCD: they are all leaking and the contact are corroded too.
It's possible that recapping the LCD panel will bring back the pictures. The LCD cable of the PB150 is much stronger compared to the other powerbooks of the PB100 series so I doubt it's broken. You can test all the leads of the cable for continuity.
Also look for leakage on the PCB under the pram battery. These often go bad in the PB150 and leak on the PCB.
When your powerbook 150 was still working, were you able to cold start it from the battery ?
Mine works fine but won't cold start from his battery, eventhough it has a new Pram battery. Once it's started from the power adapter, I can work on the battery. Very weird issue.
It's possible that recapping the LCD panel will bring back the pictures. The LCD cable of the PB150 is much stronger compared to the other powerbooks of the PB100 series so I doubt it's broken. You can test all the leads of the cable for continuity.
Also look for leakage on the PCB under the pram battery. These often go bad in the PB150 and leak on the PCB.
When your powerbook 150 was still working, were you able to cold start it from the battery ?
Mine works fine but won't cold start from his battery, eventhough it has a new Pram battery. Once it's started from the power adapter, I can work on the battery. Very weird issue.