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Problem for Philips 9P5544C 55 in. Rear Projection Television

After power on TV the screen shrinks to (50%) and then back out to (100%) back and forth for about 15 ...

By Linus2 on Oct 30, 2007

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I have the Philips 55 in Rear Projections TV, after on Weekend we came back home and noticed all the digital clocks in the house was the wrong time, it seems when we were out the power in the house went out ... then a few days later I turned on the TV mentioned above. After I power on the TV the screen shrinks to (50%) and then back out to (100%) back and forth for about 15 minutes ... it seems to be getting longer. I read some where about a power regulator or power related problem. But there are no details on what i shoud replace or how i shoud go about to troubleshoot this issue. I am a very technical person, i believe that i can fix this with no problem. I have not done anything as yet to fix this. Please help. Thanks in advance.

Comments:

Oct 30, 2007

- I forgot to mention after about 15-20 minutes or so the TV is fine ... the image on the screen stop shrinking and expanding ...

Oct 30, 2007

- Thnks for the reply ... i also forgot to mentioned that this started about a month ago ... you are right i didn't relized that DST might affect the clocks, but it was before that. I will go and check the format/aspect settings. Not sure what it is set too right now, but i will check ... i will keep everyone posted.

Oct 31, 2007

- I check the TV and went through the settings ... there is no options for me to set the format/aspect ratio. No such settings on this model.

I connected the DVD to the TV and the same issue so i don't believe that the problem is the source.

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Nov 28, 2007

- I HA- kaylo

Best Solution

posted on Sep 07, 2008

Ecollier2012

Rank: Guru Philips

Expert
Rating: 93%, 580 votes

If you have no sound or video or if your screen keeps shrinking and expanding its typicaly the opto chip. You can get the chip and repair instructions from www.magnavoxhelp.com . This is a fairly common problem.

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Solution #2

posted on Oct 30, 2007

Techmann

Rank: Guide
Rating: 79%, 6 votes

the quetion is: have you checked your format/aspect settings? if it is on auto-format, picture size will vary due to program you are watching.....or is it a raster/width problem? The thing about the time on digital clocks: daylite saving time usually started last saturday, the federal goverment changed it, the fall back time is now this saturday! Most newer digital clocks auto-change according to old schedule....( not sure if you were aware of this ) let us know whether a width problem or what......

Comments:

Oct 31, 2007

- after reading this, I would start with resoldering the connections in the horizontal circuts...flyback transformer, drive transformer, coils ect. looking very closely you may be able to actually see a cold connection on one of these....you would not belive how many intermittant problems have resolved be doing just that on all brands of set....I think it may be connections because it seems to work properly after some time being on....I would definitly try that first....let me know....

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