UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

gridrunner · 24th Jul 2022, 1:11 pm

Hi Tony, I will do. Maybe it's a bad assumption on my part. The machine was working previously although it had an error code 1000 displayed (I believe this is to do with a touchscreen option, but this monitor doesn't have that option).

The screen currently has no display but I a had hunch something was wrong with the HT because I can't hear or feel any static build up or 'fut' that you usually get with CRTs, but then I suppose this is quite a small tube.

The other strange thing was that the machine had the co-pro option fitted. When I powered the machine on, all the diagnostic LEDs were lit and stayed lit.

Removing it allowed the LEDs to cycle through the boot process and they all go out, but the display is still blank. The 5V rail is OK if a tad low at 4.98V. It doesn't drop with either the co-pro board or the extra memory board attached.

24th Jul 2022, 1:11 pm	#14
gridrunner Pentode Join Date: Jun 2008 Location: Manchester, UK. Posts: 227	Re: HP 150 Touchscreen II repair Hi Tony, I will do. Maybe it's a bad assumption on my part. The machine was working previously although it had an error code 1000 displayed (I believe this is to do with a touchscreen option, but this monitor doesn't have that option). The screen currently has no display but I a had hunch something was wrong with the HT because I can't hear or feel any static build up or 'fut' that you usually get with CRTs, but then I suppose this is quite a small tube. The other strange thing was that the machine had the co-pro option fitted. When I powered the machine on, all the diagnostic LEDs were lit and stayed lit. Removing it allowed the LEDs to cycle through the boot process and they all go out, but the display is still blank. The 5V rail is OK if a tad low at 4.98V. It doesn't drop with either the co-pro board or the extra memory board attached.