I have this amber TTL monitor that seems to be defective-not working, has no burn in at all so must be low hour
I only get power LED when turning ona nd heaters but nothing else, now at first I thought uit was just waiting for signal but after trying multiple 8bit Hercules video-cards I am starting to suspect the monitor might have a fault in it.
I have no other monitor to verify that indeed it could be the monitor but am very sure it is
The monitor has 3 IC a TDA2593,TDA1170N and a 74LS136W which I suspect might be the problem, but how can I verify that indeed the monitor is at fault here
now common problems with these TTL is that someone might've connected it to some unwanted signals like a VGA
and I heard that might damage the monitor, is that true and it probably fried the LS74136 right ??
Can I use a arduino to simulate a TTL signal to input into this thing to test it ?
anyone
>>1013297
It's a slow board, be patient
This is a slow board. Bump in 24 hrs. Have you got a schematic?
If it were mine, I'd start by checking the power supplies first.
>>1013299
I found a broken solder joint on a power transistor, maybe that will fix it
its a BD202 with A BIG HEATSINK ON IT
aleluja, it indeed was the broken solder joint, looks good, now just to put the computer back together and see this baby
>>1013310
Good one.
![IMG_20160624_144027[1].jpg](https://i.imgur.com/dXF35dt.jpg "IMG 20160624 144027[1]")