Jonsey74 wrote on 2021-05-25, 20:16:Hello, […]
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Hello,
i bought an Compaq Presario CDS 522. Nice little Computer.
The Problem is when you turn on the Computer, no Picture appears but the PC works in the background. The CRT monitor is running but there is no writing or anything like that on it. It has no HDD but you can boot MS-DOS with a floppy disk.
If someone has a solution or can help me in any other way, I would be very grateful.
THX
MFG
Jonsey74
Hi Jonsey, if you still have your Compaq with the same problem, maybe I have a solution for you (or maybe to other people with the same problem).
You need to keep in mind that working on these computer monitors can be EXTREMELY DANGEROUS, so proceed at your own risk!
Before touching anything, safely check and if necessary discharge the power supply main big capacitors and high voltage from the CRT... there are plenty of info on how to do that over the internet....
I recently bought one of these all in ones (524) with the exact same problem. On my computer the problem was related to the CRT neck board (the small board that attaches to the tube), there was a 100uF 25V small capacitor that was shorted and thus preventing any video output to the screen.
Maybe that could also be the problem with your computer, I think it's worth a try.
Check all capacitors in the CRT neck board with a multimeter in the Ohms scale and see if there are any with very low resistance (you must remove them from the board or lift one of the legs first), or just change them by new ones.
Hope that helps