Question about Sony KDSR50XBR1 50" Projection HDTV

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TV loses picture/sound after 5 minutes then comes back. Repeat

The TV starts up fine. After 5 minutes, sound and picture disappear. Standby light blinks continuously for 1-2 minutes, then sound and picture/sound return. Standby light steady. Symptoms repeat randomly every 5-7 minutes.
Checked all the connections and performed a reset according to the manual - no help.
Set is 3 years old, no previous problems.
HELP!

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  • Sony Master
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The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; [Exclude the model number], in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Posted on Sep 03, 2017

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: KF50XBR800 Rear projection LCD TV on and then standby

from how long you have this problem? and what made it start?
do u remember the cause?

Posted on Dec 28, 2007

racer7x
  • 42 Answers

SOURCE: Sony KDF 60WF655 standby/power light blights 10 times then repeat


This is what I found
You may want to have a Tv repair shop look at this .

Standby light flashes 10X

Symptoms / Customer Description
Standby light flashes 10X
[Primary Symptom Code: 2111 ]

Solution

G1 and G2 boards are ok.

Found Q box was causing loss of DTL MODULE 5v.
Replaced Q box to resolve.

Part #
A1058689A





Posted on Feb 10, 2009

video-tek
  • 150 Answers

SOURCE: Sony 52" rear projection tc

Hi, thats the code for AKB fault, this requires a tv tech to fix,, not a big bucks repair, video-tek

Posted on Feb 10, 2009

  • 73 Answers

SOURCE: Picture & sound go off for 1-2 minutes, then return.

If the green light starts flashing after losing pix and audio and then becomes solid and pix and sound return.I would suspect lamp.

Posted on Jul 14, 2009

  • 1 Answer

SOURCE: picture and sound shut off, blinking green standby

MY SONY PROJECTION TV WENT BLANK WITH NO SOUND GREEN LIGHT WAS ON WHATS WRONG

Posted on Nov 17, 2009

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Sony KDSR50XBR1 50 black screen, no faults! Lamp working, fans OK Sony KDSR50XBR1 50" HDTV: The light engine was working fine before the fan quit starting on it's own. After disassembly, cleaning and lubrication of the fan, I have no errors but the input display or menu options will not post on the screen. The lamp is on but seems to either be projecting a solid black picture, or not be at full brightness and there are no faults. I have a solid greed LED on top, but can get no picture. Sound is fine. What should the lamp voltage be at operating mode? I have tried reseating connectors and pushing on the wires to make sure the connectors seat. This is baffelling because the lamp fired fine for 1 second before the stuck fan issue was corrected and I have no faults now after lubricating the fan. I'm going to check connectors again today as a triple check; as I did remove the power supply. The TV has been reset per instructions in the book. Any advice would be much appreciated but I cannot believe it's the OB as it worked fine before the fan quit and it's about 14 months old. I'm thinking something may not be assembeled correctly, but everthing seems to be pretty idiot proof for re-assembly. Also the menu or input banners will not post. I have 2 new lamps, so it's not that.It seems to be stuck in somne black screen mode. The large fan does start by itself now after cleaning and lubrication, therefore no fault blinks. Please help!!!

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