Thursday, December 29, 2011

Samsung LCD TV Self Repair - Capacitor Replacement

My Samsung LCD TV started showing colored spots which would go away after turning off and then back on. Then they got worse becoming spots and streaks and the problem wasn't completely going away after turning off and then on again. It also started taking longer to turn on. A colleague at work had the same problem and fixed the problem by replacing capacitors. A quick Google search revealed this was an easily repairable by replacing capacitors on the power board.

Once the back cover is removed, the power board is under the metal cover:
The cover over the power board was removed:
Close up of power board: (The bad capacitors are in the upper right corner)
Bad Capacitors: (Bulging and leaking tops)
I desoldered the bad capacitors and bought replacement capacitors that had the same capacitance but higher voltage rating. The new capacitors were slightly larger but still fit.

Soldering job before and after trimming leads:

The new Capacitors:

The cables were reconnected, power board cover and back cover were replaced. The TV is good as new and functions perfectly.

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