Picture/sound shut off, come back, shut off again....
Last night my TV started acting up. The picture will go black and the sound cuts off, get the flashing green light right away and all comes back on after several seconds (in the same manner as when the TV is first turned on), then after a minute or so it repeats this whole process.
I had unplugged it for 15-20 minutes last night and when I plugged it back in and turned it on, after a minute or so the same thing happens. I also left it unplugged overnight and when I plugged it in this morning, the behavior repeated itself after a minute or two.
The TV is a couple of years old. It sits on a TV stand, not within a home theater unit. I am utilizing one HDMI port using a 5-1 HDMI switcher with HD DVRs plugged into it. I also have HD DVRs plugged into the two component inputs, two SD DVRs plugged into two of the S-video/composite audio slots and a VCR connected to the antenna input. I have used this confirguration the whole time I've had the TV, with the exception that the 5-1 HDMI switcher has only been used for a couple of weeks now.
I know my way around connecting components, etc., but am not as polished when it comes to the actual nuts and bolts of the equipment.
Any help you can provide is greatly appreciated.
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Power supply board is dying not giving the tv correct voltage anymore.The power supply board,that the board power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
make sure u set ur output to AV u will find this on ur remote control or on front of ur tv set in regards ur tv will not show a picture since ur last adjustment try to go to menu and follow instruction how to set the tv back to factory setting......this may give u ur picture back......if not call mitsubishi service centre and tell them about ur problem u have......i am sure they will help u
Convergence ICs are STK392-110 you will need two of them they are available at the link I am posting and they give free instalation instructions with pics and free tech support so you can do the repair yourself.Heres the link. http://servicemanuals.vstore.ca/
Rarely picture tube also shows the same symptom. High pitch sound is due to through deflection area LOT power supply is loaded. Compulsary horizontal output transister short. From your statement i think Lot puncture takes place. Change LOT and horizontal output transister and check tv is now working.