Question about Olevia 237T 37 in. LCD TV

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Yesterday, I powered on my Olevia tv and I had a strange purple screen and no picture so I turned it off. When I turned it back on, I had no picture. So now, the blue standby light is on, but when I try to power it on, the standby light turns off, but I get no picture. After about 10 seconds, the blue standby light comes back on. I've tried leaving in unplugged for 24+ hours with no success. Any suggestions as to the next step I might take to see if there is anything I can do. Thanks.

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This one is a common problem for L.C.D screens. 6 screws that attach the inverter board to the LCD gray metal bottom loosen over time, causing the TV to periodically lose video while retaining audio. Sometimes turning the TV off and on again restores video, sometimes not. The problem gradually gets worse making the TV unusable.
To fix it yourself is a time consuming and difficult task, although you need no additional devices to be replaced. The disassembly and assembly may eat a lot of your time. But if you are still interested get yourself a service manual (must have came with the t.v or you may download it) and follow the disassembly instructions given in it. Go through the following steps: Stand Disassembly, Back Cabinet Disassembly, Angle Back Disassembly and LCD Cover Disassembly.
Once the LCD cover is removed, on the left side you can see the metal cover of the inverter board and the six screws holding it down, the very screws that we have been looking for! Remove the six screws and the metal cover. Without disconnecting any of its connections, rotate the inverter board up and to the left to expose the bottom of the inverter board as well as the gray metal bottom of the LCD to which the inverter board is attached and grounded. Note the 3 copper rectangles on the bottom of the inverter board surrounding the 3 screw holes away from the left edge towards the middle of the TV. These are the grounding strips that lose their connection.

Using contact cleaner clean off any black burn marks from these connectors. Also clean all black marks from the grey metal bottom that they contact. Clean carefully and thoroughly. You might need to scrape lightly to remove all marks.

Rotate the inverter board back in place. Line up the metal inverter board cover. You can either use the 6 existing screws or purchase replacement screws (only if you are not satisfied with the old ones). Using a removable thread locker coat the screw threads of one screw. Tightly screw in the middle edge screw first. Follow this by the edge top and bottom screws, then the middle inner screw, and finally the top and bottom inner screws, using the threadlocker on all 6 screws. Verify that all screws are tight.

Now start the reassembly in the reverse order of your disassembly. If you have done everything fine, you can find your t.v working fine.

Best Regards. Thank You.

Posted on Jul 31, 2010


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