Question about Mitsubishi WS-65712 65" Rear Projection Television
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Posted on Jan 02, 2017
1. Check for no 8.4 volts DC at pin 3 of PC9A10 on the Power PCB, if low or missing replace PC9A10 part # 268P058020. 2. LED does not blink at plug in. Check for 3.3-volts DC at connector RF pin 3 (system reset) if low or missing suspect the reset switch S7L20 part # 432P109010 on the Control PCB. 3. LED does not stop blinking after plug in. Verify the standby supplies, 12-volts at connector KA pin 17, 6-volts at KA pin 18 and the 28-volts at KA pin 19, if the supplies are present suspect the DM PCB part # 934C067002 4. LED does not stop blinking after plug in. Check C9B01, C9B02, C9B10, and C9B11 (1000 UFD 16) on the DM PCB, if they are bad replace them with part # 181P734030 (680 UFD 16 V). 5. LED stops blinking after 70 seconds of plug in but will not power on. This model is equipped with a keyboard lock feature; this can be mistaken as a no power condition. To unlock the keyboard press and hold the "menu" button on the front panel for 10 seconds 6. LED stops blinking after 70 seconds of plug in but will not power on. Check for 3.2 volts DC at connector RF pin 4 and 5 on the Signal PCB if low suspect problems with the switches/buttons on the Control PCB part # 935D736001 7. LED stops blinking after 70 seconds of plug in but will not power on. Keyboard is not locked and key inputs at connector RF pin 4 and 5 check good suspect the E2P PCB part # 934C061001
Posted on Sep 05, 2007
SOURCE: cannot turn tv on
What i did to fix the problem, and no i did not throw it off the porch which was my first idea after i received an estimite. There are 4 capcitors on the d board which a believe is the digital board. Its located to the left of the card tray and its the only board in a steel can cover. They need replacement. I bought mine at radioshack and the repair worked for me. I was later told that the radioshack caps will blow out in a few months but i had already installed them. It worked.You have to desoder the old ones out and resolder the new ones in. It cost me about 2 hours time and 5 dollars at radioshack because i needed to buy solder as well. I will try to find the directions someone sent me and post them, also i will try to find the right (cap) part number as i stated before, the radioshack ones are not going to last. You have to use HIGH HEAT cap do to all the heat the tv puts out.
Posted on Oct 11, 2008
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