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I'm not sure that the set can handle the speed, but make sure that the sync pulse is on the green when you make the connection. Also, you must use the component input not the composite. IF hte picture ends up being purple, you will need ot change the set from YPrPb to RBG as well.
Ur convergence is dead.Must replaced 2 Convergencce ICS,and some or all it resistors.Can u solders?Buy a convergence kit at Tv repair World.com,Tvrepairkits.com to repair it ur self.The shop will cost u $300 for parts and labors.
This is not a diy repair, unless you have a service manual, can follow a schematic or have circuit repair skills. The main cause is bad convergence ICs (large black ICs mounted to large heatsinks). The ICs go bad and usually take out micro fuses/fusible resistors when they short out. Another problem is they can take out the voltage regulators that feed the ICs. If you don't know where the fuses or the regulators are ( or how to test them) you can cause more damage then good, and turn a inexpensive repair into a very expensive one.
If you occasionally have a picture then you stand a good chance of repairing this tv. There are bad grounds on the deflection board. Start with the board that has the flyback. I do not know the year of your tv. Sometimes the same model may have an option improvement than one couple of months earlier. The first suspected problem would be the vertical IC. In some cases this ic is located on the convergence board and in others the flyback board. It has seven pins and is the TDA version. Located on a large heatsink. Resolder this and any other grounds on both board. Some will tell you the P I P board is bad. This is a free standing board that can be removed and replaced. But please do the earlier option first.
We contacted Mitsu today in Irvine. Sounds to us like they're aware of a widespread problem with this model. Told us to get a Mitsu Tech to diagnose and fax to them the outcome and someone would contact us back within two days. Seems like so many are having the same problem and all about 2.5 to 3 yrs. old. I paid $3,500.00 for mine. I'm not going down without a fight with Mitsubishi. Thought they were #1 in the Big Screen world. CLASS ACTION LAWSUIT OR RECALL BY Mitsu should be in order....They know there is a problem with the power supply module.