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Have HCL552W and after normal operation for 1-2 hours TV screen flickers briefly and then goes to blue. Audio disappears (no noise). Turning the TV off and back on usually solves the problem for another few minutes. Do I have a bulb problem or some other component going bad (temperature sensitive)? TV is in cool basement and cable is not the problem (TV does same thing while watching DVD).

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No, no bulb problem. And the fact that the tv works just fine before and after this happens that means that no actual part is faulty.
The image turns blue when the tv signal is missing - which means that you have a faulty connection between the mainboard (the part that holds the tuner and all the inputs and the associated circuits) and the image board, the one that converts the signal in a format that is usable by the CRT. Since it appears to be heat caused then you should open the tv, find where the boards heat the most and check every wire and soldering, every connector and every jack and reseat or resolder the iffy ones.

Posted on Aug 31, 2010

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