MCR Timber Problem

rockinganker

Member
Joined
Nov 12, 2008
Messages
521
Reaction score
2
Location
Chatham, Ontario
I am having a problem with my Timber upright. The machine will not boot, all I get is garbage on the screen.

I looked through the threads and tried all the usual things, ie cleaned all connectors, cleaned every socketed chip etc.

I even took the SSIO board off my Timber stack and tried it on a Satan's Hollow boardset I have, it worked 100%

I replaced both Z80's and have verified all voltages including the reset line. I can not get the board to go into ram/rom test with the dip switch bank either.

So, I am guessing there is an issue with either the video gen board or cpu. (Obviously!)

Original power supply has been rebuilt and I adjusted the +5 using the eproms on the SSIO pcb. Lastly to verify the power supply, I pulled it and installed it into my Tapper, worked 100%.

This board worked great for about three days after my resto was complete, then the screen turned all glitchy and now I have this.

Any ideas?
 

Attachments

  • 002.jpg
    002.jpg
    103.6 KB · Views: 12
Back
Top Bottom