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Just getting back to this. I guess I will need to get the 'scope out of storage, and will definitely consider re-capping the display. Just hope that it doesn't turn out to be the Grey-Scale chip. I guess the scope will tell us whether the signals are on the ribbon or not. Still looking for...

This machine is new to me, from eBay. The screen seems to flash between full and half height, and the image ghosts in both halves (upper hal and lower half). Moved the display back and forth, doesn't seem to be the cable. Also inspected inside the LCD. Nothing obvious. First question - does...

The ribbon cable has 15 connections between the GSC and the Display.

Np joy! I cannot find the app notes for the CHIPS & Technology F65210A. They got bought by Intel, later divested to Asiliant, after that, who knows. The parts are still around, but try to find the specs/notes! Also no joy finding specs or pinouts for the Casio/ACER MD800TT10-C1... If...

It's not. The GSC in the 150 is a CT65210A. So now to find the sheets for that!

Some progress! Apple Developer technote for this machine contains block diagram and describes *some* of the hardware. Found here: http://developer.apple.com/legacy/mac/library/#documentation/Hardware/hardware2.html It tells us that "The Display is a 9.5-inch flat panel film super twist...

I will look for a good screen first, and possible a "for parts" machine with the Interconnect board. The main prob with these old machines is the decay of the poor quality plastic. I think Apple was trying use biodegradable stuff. So the first thing that happens when you start working on them...

Haven't given up on this machine just yet. The memory adapter holds the ram mod I bought at a local Apple store many years back. They installed. The machine never recognized the ram. Store is long gone... I noticed the RAM module is marked "duo" - maybe wrong for that machine. I have another...

Apparently there is more than one "Jedi Board". I have seen photos of and have the card that holds the extra RAM. As far as I know that's the Jedi Ram Adapter. But the long, thin board that conatins the speaker, and into which the Inverter Board plugs, is also the interconnect between the...

nvdeynde - I did have the display out. And I removed the white cover on the side where the Fluoro tube is. The caps I saw were visible without disassembling the entire display, as they are on one side in a recess in the white case. (It's the Casio/Acer LCD). Are there more on the back of the...

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...

Yes, I haven't found them to be much help. They are pretty vague. Did Apple not provide actual schematics for these machines? These are basically swap-out guides for line of sales staff. For example most LCD displays can be repaired, recaped, etc. The guide simply locates the problem assembly...

Powerbook 150 that has been working like a charm. Screen suddenly shows nothing. Brightness and contrast seem to work. Backlight is on. Boots up normally with normal chime. Need help to troubleshoot the display. I have worked on CRT's, but not LCD's. :O

I have a MacIIci with similar symptoms, which then failed to boot. Am in the process of re-capping now. BTW, just a thought - did you replace the Battery with a new one, and reset the PRAM? If the Battery is bad, it will drain the power-on circuit, and shut down.