Hi all,
I recently dug out an Insignia 32" LCD that I have yet to be able to fix. I'd like to use it in my bedroom.
Here's what happens when you plug it in. Upon pressing the power button, the LED lights up green. The backlight comes on to a completely black display, with a couple of faint vertical lines.
After about 5 seconds, the colored vertical lines appear, and sometimes shift horizontally a few pixels, or change color. The timing seems to be consistent with a "No Signal" box showing up.
Further, invoking the menu or changing input sources via the side panel buttons causes some changes in the colored lines.
Also of note, the Power Supply board has no noticeable bulged caps. They are almost all "JH" brand. However, the board emits a high pitched, slightly varied squeal when powered on. When the TV is powered off, the squeal gets higher, drops down, and comes back up, in a repeating cycle. (Think of a racecar engine revving and shifting.) It sounds like it is coming from the large 450V cap, but I cannot tell for sure. Again, no capacitors appear bulged.
I have done as much research as I can find, and I am not sure if I should suspect the power supply or the TCON board first. I am inclined to believe that the functionality of the side panel buttons indicates an operational logic board, but of course I cannot say with 100% certainty.
I can post pictures upon request - let me know what you would like to see.
Thanks for any advice!!
Kyle-
I recently dug out an Insignia 32" LCD that I have yet to be able to fix. I'd like to use it in my bedroom.
Here's what happens when you plug it in. Upon pressing the power button, the LED lights up green. The backlight comes on to a completely black display, with a couple of faint vertical lines.
After about 5 seconds, the colored vertical lines appear, and sometimes shift horizontally a few pixels, or change color. The timing seems to be consistent with a "No Signal" box showing up.
Further, invoking the menu or changing input sources via the side panel buttons causes some changes in the colored lines.
Also of note, the Power Supply board has no noticeable bulged caps. They are almost all "JH" brand. However, the board emits a high pitched, slightly varied squeal when powered on. When the TV is powered off, the squeal gets higher, drops down, and comes back up, in a repeating cycle. (Think of a racecar engine revving and shifting.) It sounds like it is coming from the large 450V cap, but I cannot tell for sure. Again, no capacitors appear bulged.
I have done as much research as I can find, and I am not sure if I should suspect the power supply or the TCON board first. I am inclined to believe that the functionality of the side panel buttons indicates an operational logic board, but of course I cannot say with 100% certainty.
I can post pictures upon request - let me know what you would like to see.
Thanks for any advice!!
Kyle-
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