@Sarnau I think those are the ones I mention in my post, right?

@AndresPlazaR saw that now. Great job!

@Sarnau Thanks! It was fun to learn about the LCD, how it works and find the reason (and solution) of the missing pixels.

@AndresPlazaR the ST Books are extremely rare _and_ tricky to repair. I luckily have a diagnostic board, which helped me - besides the obvious caps.

@Sarnau Yes, repairing it has been a challenge. Fortunately, all the electronics are working now, so I feel good about that. And, of course, the rarity of the ST Book makes it even harder because, depending on what's broken, you may not be able to find it (like the LCD screen).

Do you have a diagnostic board specifically for the ST Book? If so, where did you find it? 🙂

@AndresPlazaR found it almost 2 decades ago, while living in the Bay Area. Reverse engineered it: https://github.com/sarnau/Atari-STBook-STylus-Test-Cartridge

@Sarnau Amazing! Now, if we could find that damn 120 pins connector... :-)

@AndresPlazaR yes, that connector stopped me from doing more.

@Sarnau Would you mind sharing the serial number of your ST Book? Do you have both the motherboard's and case serials? 🙂

@AndresPlazaR T23000582 for the board. The case has no serial.

@Sarnau Thanks!