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Yu can try to repair it on the component level if you can solder and take basic measurements with a digital meter you can save some cash. Most shops dont do component repairs anymorethey just sell the board and install. You may be able to find the power board online at PTS corp. They have literally thousands of boards in stock. Heres a link give them a call you will save quite abit of money. Hope this helps. http://www.ptscorp.com/television.html
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If you have a voltage meter there are some things you can check. Unplug the unit and remove the back cover of the set. Then Plug the unit back in. You will need to tape down the lamp safety switch in order to do these tests. Here are all the failures that would give you a lamp error and what to check. Cause 1. Unit powers on and works properly for a while then shuts off with a red lamp led(lamp error). Suspect bad lamp and replace. Cause 2. Unit does not power up correctly and you have red lamp led(lamp error). Check the lamp enable line at connector J14 on the back of the light engine. If pin 6 does not switch to 5 volts after turn on, but your 12 and 5 volt supplies are good, then suspect a defective light engine. Cuse 3. At power on the lamp turns on and off 3 times and then the unit shuts down with a red lamp led(lamp error). You have a defective light engine. Cause 4. Unit does not turn on correctly and you have a red lamp led(lamp error). Check for 12 volts at connector J9 pin 4 on the light engine. If voltage is missing check for an open fuse F9A09 on the power supply board. If it is open, then you need to replace the fuse and you still have a defective light engine. Cause 5. Lamp enable line at connector J14 pin 6 on the light engine does go to 5 volts at turn on, but does not drop back to 0 volts after 5 seconds, but your 12 and 5 volts supplies are good then you have a defective light engine. Cuase 6. Check for 5 volts at connector J9 pins 1 and 2 on the light engine. If low or missing check Capacitors C9A37 and C9A38. Values are 3300MF/10V. Replace capacitors if defective.
No check for bad capacitors on Power supply board they will be vented swollen or puffed up on top.
Go to Encompass Parts Distribution and look up your Model number.
My concern is that the new lamp may be having an issue and not able to hold the high voltage. If the old lamp was working, I would try this old lamp again. If this issue was with the old lamp also. Then there is something else wrong either in the power supply or the lamp ballast where it isn't able to continue to put out the high voltage.
Make sure u replace the lamp cover as the safety switch need to be closed to make the set work. If new lamp did not repair your problem , then it may well be the Ballast Board, Sometimes call the Lamp Driver.
Hi I am Vortash it sounds as if the actual fault is in your ballast circuit this is the circuit that fires up the arc on the lamp and sends the signal to the main board that the lamp is running , if this is faulty no signal is received by the board and the lamp light comes on when this happens there is usually still sound but not always as sometimes the problem affects the power supply also .. this is a job for a trained engineer as voltages at the ballast are sometimes in excess of 25000 volts at first arc that then settles to a lower voltage to run ... regards Vortash
did you use an original mitsbishi lamp. did it slide in easily? one of the most common problems with a lamp replaement is pushing the connector away from the lamp if it doesn't slide in easily. unplug the set, take out the lamp and look with a flashlight to see if the connector is in place. if so put the old lamp in and see if it works. if it does then your new one is bad. if it doesn't then email me [email protected] with your number and we can talk more.
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