I got this quite nice looking PB 190 few months ago. The seller did say it would probably need a recap of the LCD as the image is changing contrast all the time and is very temperature dependant. I was sceptical about this as those machines were supposed to have "good" caps in them and not the horrible leaky stuff as is found in PB 100 or PB 160s.
He was right though. The caps were looking absolutely fine with no corrosion to be seen. But measuring the ESR has showed that all of them were out of spec. Not really completely dead, but still with one leg in the grave dead. 1st photo is of the new cap and 2nd shows the old cap.
Replacing the caps made the LCD contrast better and 100% stable. So problem fixed
Luckily the caps in question just dry up and not leak as in older Macs, so there is not any hurry to recap them.
He was right though. The caps were looking absolutely fine with no corrosion to be seen. But measuring the ESR has showed that all of them were out of spec. Not really completely dead, but still with one leg in the grave dead. 1st photo is of the new cap and 2nd shows the old cap.
Replacing the caps made the LCD contrast better and 100% stable. So problem fixed
Luckily the caps in question just dry up and not leak as in older Macs, so there is not any hurry to recap them.
