Question about Sony KDS-R50XBR1 50" HDTV

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Q Box problem

This products picture totally failed 2 years and 2 months into its life in a protected, climate controlled safe enviroment. After paying for a Sony service call which determined the issue to be the Q Box failure, Sony's responce was... " it is out of warranty". "Write our appeal committee", good bye. I paid $3,500 for a TV with a high quality rating that needs a $1,150.71 repair in a very short life cycle. It appears Sony has ceased making quality products and supporting their Brand.

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Re: Q Box problem

Wow, it just goes to show you that even big name brands have poor qc or qa on their products.

Posted on Apr 05, 2008

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Put new bulb 2 wks ago, now I have sound but no picture, hear fan running, but bulb does not come on. Turns on just fine no blinking lights at all

You have a defective bulb. Unfortunately it does happen. If you bought just the bulb, then don,t do that again. Always buy a new bulb with the housing and don\'t touch the bulb eith your hands. Most bulb sellers warrant their bulbs for at least 3 months. Some warrant for up to one year but you pay a little more, about $80-100. If you bought the $35-45 bulb (made in china) then you get what ya get. Nothing against the chinese, just the people who pay them 30 cents an hour to make a product extremely fast with no care for quality control. The chinese are hard working people. Chinese products are made to be disposable on purpose so you can buy a new something more often.

Feb 22, 2013 | Mitsubishi Projection Televisions

1 Answer

Screen keeps going black

It is possible but the only way to know is to try that.

Lamps have about a 2000 hour life span which works out to about 2 years for the average user.

Usually in this model just before the lamp fails the picture either comes on somewhat darker than usual or gets dark just before the picture goes out.

The set will detect lamp is not bright enough etc and blank the screen.

The lamp light (I have seen this) sometimes will not come on even if the lamp has a total failure----no picture at all.

You might also check with a local shop or someone with the same model so you can swap lamps to see what the problem is.

Let me know what happens.

Dec 17, 2011 | Sony KDS-50A2000 50" HDTV

2 Answers

I have the Toshiba 61A61 TV. I am not sure what exactly happened, but when the TV was on, suddenly the picuter went black. I still receive the normal sound, but can't get any picture (totally black). I...

Check all connections?Unplug,replug the cable box about an hour later let it upgrade it software.The projection lamp has not been replaced in this tv the last 1 1/2 or 2 years?The tv been on and watches at lest 4 or 5 hours a day?Yes,than the projection lamp life is over.Require a new projection lamp.

Sep 03, 2010 | Toshiba 61A61 61" Rear Projection...

1 Answer

My 42e2000 just said "lamp at end of projected life". I have had this TV for several years, have had it isf calibrated 3 times (the last time was 1 month ago). At that point, the technician said everything...

I recomend chnge the lamp now to avoid ballast problem after.and remember reset the lamp timer after change.for reset lamp timer press menu in the remote control ----setup------in the color adjust side find lamp reset ----a change a new lamp question appear--push yes and ok.

Apr 09, 2010 | Sony KDF42E2000 42" HDTV

1 Answer

Mitsubishi tv model wt-42311, error code 2-2. what can i do?

2,2 IS short protection and 95% chance it means one of the two pico fuses that protect the convergence IC chips are bad.

This model uses two of the chips: STK-392-110 and you would have to pull the light box out to replace them safely (total parts cost will be under 30 dollars).

It involves getting at the chips and the fuses and replacing them: how much skill do you have?


Mar 25, 2010 | Mitsubishi WT-42311 42" Rear Projection...

1 Answer

Mitsu WS-55859---turned off & only powers up for 2 secs

2,2 is short protection.

98% chance the fuse or fuses (there are two 5 amp pico fuses) that protect the convergence circuit are blown. If you find F9AO4 OR F9AO5 on that board check them--if either is open the STK-393-110 DID IT.

Fairly short life for this chip if it was installed correctly and had heat sink compound applied to it--once in a while you get a bad one.

If this has helped you, rate this solution as I do this here for FREE.
sd tech

Nov 19, 2009 | Mitsubishi WS-55859 55" Rear Projection...

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No picture

The lamps life span is 1 - 3yrs, Purchase your lamp directly from $199 they back up there products. Good luck

Jan 27, 2009 | JVC HD-52G786 52" Rear Projection HDTV

1 Answer

A repair question for the RCA M50WH74S

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |

On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Aug 18, 2008 | RCA HD52W56 52" Rear Projection HDTV

1 Answer

Sony 53s70 rear projection tv

Hi!! have you tried checking the main plug for it, as well as removing the cables at the back? chances are there are loose wires on it, if you only had it for two months then you still have the warranty for the product call sony's technical support

Apr 26, 2008 | Sony KP-53S70 53" Rear Projection...

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