Need help repairing Toshiba HX-10

By Wild_Penguin

Hero (530)

05-10-2018, 15:01

Nice! Good to hear you got it working!

Alexey: Agreed, I've seen the other thread. People seem to have a lot of problems with RAM ...

By windigo

Supporter (1)

14-11-2018, 22:03

I have a similar problem, only the caps doesn't turn on when i press it....any ideas?

By Alexey

Guardian (2098)

15-11-2018, 12:01

windigo wrote:

I have a similar problem, only the caps doesn't turn on when i press it....any ideas?

Go through the same checklist as everyone:

1. Inspect board for broken tracks and components
2. Check voltages and frequencies on Z80 and RAM/VRAM
3. Check RAM/VRAM (Data Out pins) and replace obviously bad ones (or all of them)
4. Deep check of the main components with oscilloscope or signal analyzer
5. Scratch your head
6. ~~Dump the MSX~~ Give the MSX to your friend to fix

By Nprod

Resident (35)

16-11-2018, 19:48

Alexey wrote:

Too bad we don't have a proper RAM tester to test every bit of RAM...

I've been able to at least test 4164's with an arduino nano using the software on this page, originally intended for diagnosing Commodore 64's.