[cctalk] Re: IBM 4863 monitor sync problem (PCjr display)

2022-11-07 Thread Cameron Kaiser via cctalk
> I had a problem like this on a VT52, and the problem turned out to be one the > power supplies (the -12v one) had died. Wired in a 7812 (or whatever it is for > - voltage) and the monitor came back. > > May want to look inside and see if a supply rail is dead. A good suggestion. This morning it

[cctalk] Re: IBM 4863 monitor sync problem (PCjr display)

2022-11-06 Thread Chris Zach via cctalk
I had a problem like this on a VT52, and the problem turned out to be one the power supplies (the -12v one) had died. Wired in a 7812 (or whatever it is for - voltage) and the monitor came back. May want to look inside and see if a supply rail is dead. C On 11/6/2022 4:44 PM, Cameron Kaiser v