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Lg rear projector model pt-53a81t. unit loses lock (rolls) especially on bright scenes-gets better as tv warms up but still not good

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Ok you have a major problem, to come, if not attended to soon. I have seen this many times at my shop. There is no home fix for anything like this fault. Although, not too serious, the re-setting up of the set after repair requires special equipment and knowledge. In my professional opinion, you should contact the manufacturers head office and inquire, as to an approved local Service Center, now when there ask for a "Quote" before proceeding with any repair.

Posted on Apr 28, 2010

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Hello, I have a LG rear projection tv model number LG 52SZ8R-ZA that has recently stopped working at 100%. The screen appears alot duller as though the brightness has been turned right down. Is the problem...


Hello, You can get better prices for bulbs on the Internet. I went through this problem with my set.
Sometimes there is an upgrade in bulb Wattage on an individual basis by Model. What you may be having problems with is a system called a "Light Engine". This assembly has the power module and a spinning part called a "Light Wheel".
Your problem then can be from any of these devices. Your old bulb could have a dark spot (As normal light bulbs can develop), a weak power module, or a light wheel not spinning at the correct RPM for clarity.
You can take a chance and try a new bulb yourself or call for a Technician to give you either a "Convergence Set-up" or Evaluation and Repair estimate.
I learned about the insides of these TV's from the Front-Projectors and my own Rear-Projectors which had Warranty Recalls. So I have seen Messed-up and know what it looks like and somewhat about the causes and cures.

If you are getting a Convergence service, you may want to get the Estimate, then install a new bulb through the Internet, and then get it all set up fresh with the new bulb.

Oct 11, 2011 | LG Televison & Video

1 Answer

Even with a new panasonic bulb;the picture is not as bright as when it was new.prob?


We replaced the lamp on our pr61lcx65 rear projector panasonic tv. We still have colorful spots and now it is getting darker and have yellow on bright picture and red on dark picture running through it. Please help.

Feb 10, 2010 | Panasonic PT-61LCX65 61" Rear Projection...

2 Answers

Pt47wx49 panasonic rear projection tv has very dark tv scenes


Has this problem been getting progressively worse? I would suggest cleaning the CRT's inside the tv with lcd screen cleaner or something similar. Make sure the tv is unplugged, all you have to do is undo some screws on the back to gain access to the inside of the cabinet. Hopefully that's all it is. Your set has no lamp if it is a Panasonic Pt47wx49.

Nov 29, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Vertical rolling during bright scenes w/ high white content


power supply voltage not stable check capactors and look for dry joints.

May 02, 2009 | Samsung TXM3297HF 32" TV

1 Answer

Panasonic TV projector PT 4743G


yes the convergence ics will blow that resistor

Jan 21, 2009 | Panasonic PT-51HX42 51" Rear Projection...

1 Answer

Panasonic PT-61G63W Too much Black Serial No: MY83430025


The mirror should also be cleaned. but there is more adjustments that can bring up brightnes ie G2 on the flyback transformers but that is some thing a tech should do. Because you have to ad enough of each color to get a gray scale. if you are off the picture will be tinted and your color will be way off.

Dec 26, 2007 | Panasonic PT-61G54 61" Rear Projection...

1 Answer

Projection tv lamps


All fillament based lights will dim as they age. Some of the newer/better types it will be unnoticible.  If you are losing image quality or brightness you may have a bulb that is nearing the end of it's life cycle.  A glance at you owners manual or the manufactor's website should give you an indication of the expected life of your bulb.  Also most of the projector made in the past few years have a counter that tallies the amount of hours your bulb has been on.  A more likely culprit is probably dust accumilation somewhere inside your projector. Most projectors have filters these days and need to cleaned at certain intervals and in certains ways.  Not cleaning these filters can cause heat build up that can increase operating temps and shorten the life of your bulb and or projector.  Or sometimes jsut fail and cause a dramatic decrease in image quality.  Again these things are vendor/model specific so you will want to check with them about your particular model. Hope this helps.  

Nov 24, 2007 | Panasonic PT-51HX41 51" Rear Projection...

1 Answer

Picture looks whited-out


try to put only one input directly to ur unit using also the HD input, if the pictures is good, that means your switcher is ur culprit

Jan 15, 2007 | Mitsubishi WS-65807 65" Rear Projection...

1 Answer

Darkening tv picture


The Picture tubes(not bulbs) do and probably are weak. There replace should only be done by a trained service person. One reason would be the hI Voltage issues related to the crt's, as these tubes store alot of HI voltage even after its unplugged for a while, and another reason would be that these tube can very easy implode then explode and that wouldnt be a pretty sight. Third would be the alighnment involved after all three tubes are replace. There ba cross hatch generator and alot of time involved with the alighnment. Please seek a pro to assit you when your ready to spend at least 900 TO 1000 bucks. Good Luck

Jun 30, 2006 | Hitachi 53FDX20B 53" Rear Projection...

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