Re: DEC Rainbow PC100-A

2016-01-18 Thread shadoooo
So if all LEDs remain on, that most likely means the CPU is not able to execute instructions at all. It might mean a busted CPU, busted ROM or CPU bus, or missing power or clock. Yes, that's exactly my feeling... so a schematic would be very good to try to diagnose an evident problem as mi

Re: DEC Rainbow PC100-A

2016-01-18 Thread Warner Losh
On Mon, Jan 18, 2016 at 10:13 AM, tony duell wrote: > IF the PC100-A is like the PC100-B (which I have full schematics for)... > > > All LEDs on, means, "replace the system board". > > > > I'm not sure, he wanted to hear that ;-) > > And it's not even right!. You can have all LEDs on with a perfe

RE: DEC Rainbow PC100-A

2016-01-18 Thread tony duell
IF the PC100-A is like the PC100-B (which I have full schematics for)... > All LEDs on, means, "replace the system board". > > I'm not sure, he wanted to hear that ;-) And it's not even right!. You can have all LEDs on with a perfectly good system board. A fault in the power-OK circuit in the P

Re: DEC Rainbow PC100-A

2016-01-18 Thread Paul Koning
> On Jan 18, 2016, at 9:59 AM, emanuel stiebler wrote: > > On 2016-01-17 18:11, Warner Losh wrote: >> Would love to help, but I have the PC100-B. The PC100-A board is somewhat >> different than the >> PC100-B, but not super different. >> >> Have you checked the diagnostics table in the technica

Re: DEC Rainbow PC100-A

2016-01-18 Thread emanuel stiebler
On 2016-01-17 18:11, Warner Losh wrote: Would love to help, but I have the PC100-B. The PC100-A board is somewhat different than the PC100-B, but not super different. Have you checked the diagnostics table in the technical reference to see what all LEDs lit means? I'd crack open my copy, but it

Re: DEC Rainbow PC100-A

2016-01-17 Thread Warner Losh
Would love to help, but I have the PC100-B. The PC100-A board is somewhat different than the PC100-B, but not super different. Have you checked the diagnostics table in the technical reference to see what all LEDs lit means? I'd crack open my copy, but it is buried in boxes at the moment. Warner

Re: DEC Rainbow PC100-A

2016-01-16 Thread emanuel stiebler
On 2016-01-16 14:15, shad wrote: After full disassembling, cleaning and reassembling, I'm ready to try it! PSU seems to work well, power goes on with almost precise voltages, then all the test leds on the back will lit on... then nothing happens! No video, no sign of life. And they stay AL