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This is an extra set we've had for a while. It spent some time in the garage (6 months), because the picture was "squished", with black bars top and bottom, none on the side though. When I got around to messing with it, it will not turn on. I plug it in, and it clicks, like it is powering up, and the screen flashes white, and it instantly goes off, and instantly retries to power up, clicks, white flash, off, clicks, white flash, off. This continues until I unplug it. Power button does nothing. Once, it actually came on and stayed on, with the "squished" picture, but worked fine, until I turned it off. Then the click, white flash, off, started over. So, I know it is old and may not be worth fixing. But I am going to try (it belonged to my wife's dad), so any advice would be very helpful. I have electrical experience, and all the safety tools, and what have you. I am just lacking schematics and manual. Thank you for your help.
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The set weighs a ton so getting inside is first challenge.
Problem is in vertical circuit--9 out of ten times bad solder connections on the vertical output IC---usually if rapped on the cabinet the picture may try to open up.
The chip will have a location number like IC301 or 401 and if memory serves me be a LA7845 with that or a similar LA number right on the front.
If get to it only 7-13 pins (depends which chip is used) in a straight row--look at the solder connections on them--if find any that look a little discolored or even cracked solder all the pins.
picture of what a typical chip looks like:
the actual number will be right on the face of the chip
Mitsubishi
sets use a four-digit code for a V-Chip locked program, view a locked TV,
cancel the lock, or to enter the V-Chip lock menus. You can view the locked
shows on the TV set by pressing the number 9 and QV buttons on the remote at
the same time, whenever your code is requested. This process temporarily
unlocks the TV and asks you to enter a new code.
Almost any Mitsubishi remote will work for standard adjustments--just that simple.
If issue is too much red, green or blue(not a good black and white picture) the controls for those adjustments are located inside the set on the board that plugs onto the end of the picture tube.
Let me know what your issue is and I will advise further.
There are two issues, the first is a vertical deflection problem, "needs a few parts+an ic" the second problem is intermittent color, "crystal and color processor ic" If the set is close to 10 years old then your money is better spent on a new tv.
U can't do it without the original remote.Go in the tv menu by the manual button control might could set the sleep timer.This is a extra option on most tvs.
Yes first it may just be bad solder on the
flyback transformer , or the Picture in Picture
module has some bad caps . a fair shop
price is about 180-200 and it worth the repair
they are great TVs and are made to last.
ps i have repaired my mitsubishi once , and
its going strong. 18 years old .
Troylove, Thank you very much. What do you mean?
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