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Home Forums Powerbook 150 - screen is blank — #7 Powerbook 150 - screen is blank — #7
Post #7 by joe4227@sympatico.ca
Source ForumPowerbook 150 - screen is blank — #7
CategoryHardware
Post DateSun, 19 Aug 2012 - 07:28
Original URLhttps://68kmla.org/bb/threads/powerbook-150-screen-is-blank.26038/
Post
In disassembling yesterday, the caps all look like the day they were born. They are all SMT's. No leakage.

The Pram battery is showing about 1.3 volts, likely one cell is dead, again no leakage yet.

I have an uncomfortable feeling that it's the JEDI Interconnect board. The machine came on when I was assembling it at one point, just as I was plugging in the cable between the JEDI and the Motherboard.

The invertor board must be working, as the fluorescent backlight is on.

Without schematics, it would be difficult to troubleshoot it properly. Could have blow the video output chip(s) on the MB, or something on the JEDI board.

Luckily, today I found a 180c on eBay, and managed to get it. So a little step up. I want to keep a 68030 machine running while I am recapping and restoring my Mac IIci.

There was another 150 on eBay a few days ago, sold for parts as the owner did not have the Adapter to test it. But it must be gone, as I can't find it now! If I can find another machine, I can compare volyages, etc between the two...

mp.ls