Hi,
I've got. Celcus TV in that shuts down usually after about 45 minutes. It can then be turned back on but then shuts down in between 2-5 minutes each time.
The backlights look like they're all lighting up however the screen when a picture is on it is very dim. I haven't stripped tv yet to check backlights with my tester.
I have pulled all caps from the board and tested them with my ESR meter and they all appear good on the cold side.
one thing to note is that when the tv powers up there is a high pitched whine and a faint crackling noise coming from the Vestel 17IPS20 power supply.
It appears to be near the transformer TR200.
I've also replaced all the F5404 diodes as a precaution.
Any pointers would be helpful, I'm determined not to swap this PSU out if I can fix it at board level :-)
Cheers
I've got. Celcus TV in that shuts down usually after about 45 minutes. It can then be turned back on but then shuts down in between 2-5 minutes each time.
The backlights look like they're all lighting up however the screen when a picture is on it is very dim. I haven't stripped tv yet to check backlights with my tester.
I have pulled all caps from the board and tested them with my ESR meter and they all appear good on the cold side.
one thing to note is that when the tv powers up there is a high pitched whine and a faint crackling noise coming from the Vestel 17IPS20 power supply.
It appears to be near the transformer TR200.
I've also replaced all the F5404 diodes as a precaution.
Any pointers would be helpful, I'm determined not to swap this PSU out if I can fix it at board level :-)
Cheers
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