I couldn't find a thread started for this TV so, here we go. It's my turn again to get some guidance in this repair. I fixed about two TV's within the last year. It's been slowing down for me.
OK, this set turns on with backlights right away and they never drop out throughout the whole time. The small box saying "No Signal" is blinking at first with a noticeable scream from the power supply. Also, the box is a little distorted while it's phasing on and off at a fast rate. Again, the picture comes and goes at a fast rate but the backlights are solid on.
Anyways... I allowed this set to be left on for a while and as it warmed up, the screaming change to a chirping and then to a silence with no picture but still backlights on full. The remote works just for the Power button. This may be that the information is not being processed and sent to the screen or whatever. I am questioning the video processing board (mainboard) at this time.
I checked the power board and jumped the PS_On with the 5VSB to check all output voltages. All were as solid as I would hope for. The power supply was nice and quiet while during this time - not loaded down from anything else.
I just started working on this set tonight and I'll get back to it tomorrow.
I checked voltages on regulator on the main board, they are ok. I have not pulled the caps off of the main board yet. That's my next move.
Any other suggestions?
OK, this set turns on with backlights right away and they never drop out throughout the whole time. The small box saying "No Signal" is blinking at first with a noticeable scream from the power supply. Also, the box is a little distorted while it's phasing on and off at a fast rate. Again, the picture comes and goes at a fast rate but the backlights are solid on.
Anyways... I allowed this set to be left on for a while and as it warmed up, the screaming change to a chirping and then to a silence with no picture but still backlights on full. The remote works just for the Power button. This may be that the information is not being processed and sent to the screen or whatever. I am questioning the video processing board (mainboard) at this time.
I checked the power board and jumped the PS_On with the 5VSB to check all output voltages. All were as solid as I would hope for. The power supply was nice and quiet while during this time - not loaded down from anything else.
I just started working on this set tonight and I'll get back to it tomorrow.
I checked voltages on regulator on the main board, they are ok. I have not pulled the caps off of the main board yet. That's my next move.
Any other suggestions?
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