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PB160 screen recap failure. Any suggestions?

avadondragon

Well-known member
So quite a while back I recapped a powerbook 160's screen and the results weren't so great. I've done many successful recap jobs (including powerbook screen recaps) in the past so I felt pretty good about the work. Just recently I decided to get it off the self and check my work under the microscope and see if there were any bad solder joints or anything but I didn't see anything unusual. It's presenting vertical lines through the top half of the screen. The bottom half looks perfect. Anyone have an idea what could be wrong. I don't actually remember what the state of the screen was before the recap. I think it just had severe ghosting.

IMG_20220122_221605160(2).jpg
 

bibilit

Well-known member
Have a similar issue on one of my screens, never been able to find why , suspecting a chip gone bad in the screen board, or maybe a broken trace.
 

Byrd

Well-known member
Was the screen passable before the recap? I killed a PB100 LCD using too much heat to remove some screen caps - you might have done same. They’re incredibly fragile to work on
 

avadondragon

Well-known member
Unfortunately I can't remember what the screen looked like before although I think its was passable. I had pretty much assumed I used too much heat removing the old capacitors so it probably is that. I looked the board over very carefully and I didn't see any broken traces. The ribbon cables on these things are incredibly delicate so I thought it might be one of them be they all looked good too. Is there any chance whatsoever that I got a bad/damaged ceramic cap?
 

Johnnya101

Well-known member
Worse case, if you have around $200 to burn, they sell new LCD panels. Nobody here has tried to buy one, but they have the same part number.
 

pezter22

Member
I just recapped one of my PB165 and my screen looked exactly the same. I removed the screen again and checked continuity with all the caps and they were good. I plugged it back in and still had the same issue. With the next removal, I noticed small amounts of capacitor goo on the long PCB boards that run the length of the screen. I cleaned it up with alcohol placed it back on laptop and the screen was perfect.

So I would suggest cleaning up everywhere, not just area where the capacitors were replaced. That goo travels.
 

3lectr1cPPC

Well-known member
It’s also worth checking if there’s an issue with the screen cable. I had a similar issue with my 145 after taking it apart once (bottom half was screwed up), it was a loose screen cable where it plugged into the display. I’d try taking yours apart and adjust the display cable while it’s running. If the top half lines flicker in and out you’ve got your problem.
 
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