rockinganker
Member
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?
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?