I fixed the broken LCD!

I was given a broken LCD that had some issues with turning on and make a cricket(chirp) sound. After inspecting the insides, I found the problem was a broken power supply. The cricket sound is caused by a capacitor not working correctly and that caused the transformer to make a chirp.

I was not sure which capacitor was not working but they were all poor quality capacitors and I did not want to reopen the LCD later to fix it again, so I replaced all 7 of the capacitors. The capacitors are not expensive and it did not take very long to replace the broken ones. A few of the new capacitors are slightly bigger but the size did not cause any problems.

I have included a few images of the process…

I ordered a few parts and got my soldering stuff out and went to work.

Bad capacitors caused the problem.

So I removed them.

Installed the new ones and it was ready to be put to work.

The new capacitors should last the rest of the life of the LCD. Sadly bad capacitors are often the cause of many problems in electronics. A few years ago a large number of motherboards had bad capacitors causing many problems for a lot of people. Sometimes, like in this case, the capacitors do not show any sign of failure. A few extra cents could be spent on the manufacturing of the product to improve the lifetime but I guess many companies do not want to spend the extra $2(max) for each product.