First of all, I fixed a Toshiba 32“ HD LCD television that my in-laws were going to throw out. I was able to find the owner's manual and service manual on the internet. The service manual had troubleshooting steps that were very easy to follow. Using my trusty multimeter, I was able to determine that the tv had a bad circuit board (p/n STW37T VTV-3707 REV:1).
Back to the internet. I had no luck looking for the part on normal reseller pages. Eventually, I found a used circuit board on e-bay. I bought it and installed it in the television in about 20 minutes. Now, the tv works great. We have tested it as a TV, hooked it up to a VCR, connected it to an HD device, and a PC. Right now, the TV is a monitor for our Xbox and kids PC. All of the inputs are working.
Speaking of Xboxes, I worked on two broken ones this weekend. One of the xboxes would not read any DVDs. I took the DVD drive apart and cleaned the laser lens and the mirror. It still does not read all DVDs but it does read some. This xbox has a Thompson brand DVD drive. That is the most unreliable brand according to the Internet.
videos on YouTube about how to fix this problem. Basically, there is a small rubber belt on a pulley and gear near the front of the player. Apparently, the pulley and belt get dirty. This is the most common reason the drive will not open. Fixing the problem is simple (once you get the drive open). After taking off the belt, I cleaned the pulley with alcohol. Then, I cleaned the belt with soap and water and reassembled everything. The drive opens and closes just fine now.