Question about Mitsubishi VS-45607 45" Rear Projection Television

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Mitsubishi VS-4552A Blue, green & red lines will flash in center of screen then picture goes blank, sound works fine but no picture. Can turn off for awhile and tv will work for a little or long time until doing again.....any solutions?

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Re: Mitsubishi VS-4552A

I have to agree with Techman. Very good solution and advice.

Posted on Jul 15, 2009

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Re: Mitsubishi VS-4552A

This symptom seems to be a vertical Sweep fault cause what happens is theres a protection circuit in this set that activates when it sees theres no verticle sweep, it shuts off the picture on the set so that the tubes dont get lines burnt in the middle and become damaged. If you know your way around a TV set then you could locate the vertical output IC and resolder all its pins first as well as anything else in that circuit that looks like a cold solder connection. Then i9f it still does the same thing I would just replace the verticle output IC as well as the B+ supply capacitor off the flyback xformer for the sweep dirived power supply. Now if your not knowlegeable about these HI VOLTAGE circuits my advice would be do not attempt the repair yourself as you could get hurt and /or cause more problems with the set as there are no tubes in this set to test except the picture tubes. Contact Mits. at this #800-332-2119 or look in your owners manual for a contact #. Good Luck.

Posted on Jun 07, 2006

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Does the picture look like this?

If so I believe your CRT liquid coolant has gone bad and needs replaced.
How to diagnose bad CRT Coolant:

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Let me know if you wish to get the instructions on changing the fluid.

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For example, 3 flashes, then 7 flashes = 37.

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12 = No error detected, check power supply.
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