Question about RCA HD50LPW175 50" HDTV

1 Answer

Lights flash then powers down.

I was given this TV by the original owner who had the same problem with th LCD panel lights flashing 5 times then shutting down. He ordered a replacement bulb, but that didn't fix it. When he inquired about further on site repair the price discouraged him so he gave me the TV. I am a computer repair tech with some electronics experience ( ex-military avionics tech ). After on line researching I ordered and replaced the Light engine ( inverter/ballast ). The previous inverter had ~ 336 VDC input and no output and a forums user said it was bad. The new unit didn't fix the problem, and also has no output. Does anyone have a repair manual or schematic for this machine? I'm working blind and am not a TV repairman, though this seems like it should be repairable. Also, can the existing lamp be continuity tested ( previous owner sent the replacement lamp back when it didn't fix the problem ). The original lamp tests as open with a multimeter and it seems the filament should be a closed circuit unless there is something I'm not aware of in the design. Any help or tech literature would be greatly appreciated. Thanks

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,153 Answers
Re: Lights flash then powers down.

Before read this, keep in mind that this is not your model and parts are not the same. This is just to let you know the steps to take. Sorry don't have the schematic for your set, but maybe this will help in checking. I'm Ex-Army myself and Veteran of OIF and OEF.::::1. (Lamp may light and go out) suspect bad lamp part # 915P020010 2. Check for 12-volts DC at J-9 connector pin 4 on the Engine Driver PCB, if missing check for an open F9A09 on the Power PCB, if it is open replace F9A09 part # 283P127060 and the Light Engine part # 939P977010 3. (Lamp may light and go out) Check for 5-volts DC at J-9 connector pin 1 and 2 on the Engine Driver PCB if low or missing check C9A37 and C9A38 both 3300 UFD 10 V on the Power PCB (part # 930B921002) 4. At power on the lamp turns on and off three times and then the unit shuts down with a red lamp LED (lamp error). Replace the Light Engine part # 939P977010 5. Lamp enable line at J14 pin 6 does not switch to 5 volts after turn on, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010 6. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on and does go to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Lamp Power PCB (ballast) part # 939P978010 7. Lamp enable line at connector J14 pin 6 on the Engine Driver PCB switches to 5 volts after turn on but does not go back to 0-volts (low) after 5 seconds, 12 and 5 volt supplies are good. Suspect the Light Engine part # 939P977010

Posted on Aug 26, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have a sony rear projection TV model number kfws60s1 that will not turn on I press the on button and green light will flash 5 times then goes red again please help shed light into the problem pleaz

Understanding Sony Television Blinking Codes ' Techlore
Now the red light blinks 5 time while watching it. Is there any way of ..... 2006 that willnot power on and the green LED is blinking 6 times. We had a service ...

Sony KDF E55A20 - 5 Flashing Read Lights - TV Forums

Mar 17, 2012 - 14 posts - ‎4 authors
We have had a Sony KDF E55A20 since January 2006 and it has been trouble free. ...The TV will switch on fine green power lights. Then after about 20 ... If I turn off and turn on the power light will flash red 5 times. Leave it off ...

Sony TV - How to troubleshoot a red or blinking light ...

? 3:36
Apr 6, 2012 - Uploaded by SonyListens
Sony TV - How to troubleshoot a red or blinking light ... and power lights, these easy steps will help you determine what the... 5:17. Easiest TV repair - How to Fix Power [TV turns off, freezes, ... Get video URL at current time.

Dec 02, 2015 | Sony Projection Televisions

1 Answer

TV Turned Itself Off - Now - No Power No Lights Flashing

power supply board is faulty need to check the power transistors and fuses u will need a tech to solve this

Jul 14, 2013 | Samsung HL-R6167W 61" HDTV

1 Answer

When I turn on the tv all i get is the welcome screen, and it will not go any futher,there is green light flashing in front of the tv. and it will not turn off with the remote, i have to unplug it.

Hi Andre,

May I know if the LED light at the front panel has a pattern of flashes or flashing continuously in green color.

Please check if you can access the "Self diagnostic screen" by following the steps below.
- To activate, press the front panel "Activity" and "Channel down" buttons at the same time and hold for 5 secs. The Status led will then flash a two digit code. Example, if the error code is "23" the led light flashes 2 times(blink, blink) pause and then flash 3 times(blink, blink, blink). Let me know the error code to narrow down, it will help to diagnose where the fault came from.
Note : the TV must be in shutdown not switched off, or AC power cord is removed because the code will reset to "12" means no error. Use the front panel buttons not on the remote control. If you can't access the self diagnostic, press and hold the "Activity" button on the front panel for 5 secs before entering the "self diagnostic" code.

Nov 24, 2011 | Mitsubishi WD-60737 TV

1 Answer

Sony HD Projection TV KDP-57WS550, timer light blinks 5 times and repeats sequence. When power button is pushed sound comes on briefly, no picture, then TV goes off. Please advise.

Mine did this after a power flash. Lights blinking 5 or 6. They blink fast lol. I have sound till tv powers back down. Front yard bond fire? Or any ideas? Thx.

Dec 25, 2010 | Sony Grand WEGA KDP-57WS550 57" Rear...

1 Answer

Hitachi projection tv quit

Pls check that model number........the problem description does not match that of a 1999 crt proj tv.........I believe yours is a newer lcd projection around 4 or 5 yr old?? Lamp light flashing on any brand is indicative of the lamp not lighting . The lamp is the most likely cause,but the ballast board can cause this as should see an access door refer to owner book of the correct model and you can replace may cost around $200 and avaiolable at encompass parts .com Hitach distributor

Jun 06, 2010 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

It keeps flashing between flashing lights regards


The TV stays in standby because protection circuit kicked in.

Protection kicks in when an internal fault had been detected.

In your case the SCART cable may have caused a short.

When on protection the TV will stay in standby, will not respond to buttons or remote, and will not start up.
All higher voltages from PSU get shut down by controller board, and only the +5V remains on.

To attempt resetting the TV, disconnect all video cables, disconnect the power cord, wait about one hour and plug it back.

If TV does not restart, then there may be an internal fault.

In that case leave TV unplugged for longer, just in case.

If still no luck, then call Sony to discuss a repair. The number is listed on your owner manual.

If instead TV will restart, do not use the faulty video cable again, this can damage your TV.


Nov 06, 2009 | Sony Projection Televisions

1 Answer

Tv will not power up blue power light flashing,red temp and red lamp lights flashing

The lamp is likely blown - it is loacated behind the front panel and can be pulled out to check - unplug set and do not touch front of lamp.

Oct 11, 2009 | Hitachi 50C10 LCD TV

4 Answers

Mitsubishi WSB55

Here's something that might also be useful. After you turn on the set, and get the regular red blinky lights, hold down the Device and Menu buttons together for about 5 seconds.
The Power light will start to flash in a two digit sequence.

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

Here are the error codes, and the corresponding problem:

12 = No error detected, check power supply.
32 = Lamp Cover is open.
33 = Air filter cover is open.
34 = Lamp abnormality
36 = Light Engine (DMD or Lamp Fan stopped)
37 = Exhaust or Lamp Ballast Fan stopped
38 = Lamp Temperature High
39 = DMD Temperature High
41 = Short is detected
44 = DVI cable between FMT and Engine disconnected

Feb 09, 2008 | Mitsubishi WS-55809 55" Rear Projection...

2 Answers

Sony KF-WE50

my front panel sound is not working.......?
how i can do this.?

Jan 05, 2008 | Sony Grand WEGA KF-50WE620 Television

Not finding what you are looking for?
RCA HD50LPW175 50" HDTV Logo

110 people viewed this question

Ask a Question

Usually answered in minutes!

Top RCA Projection Televisions Experts

The Wyzzyrd

Level 2 Expert

83 Answers

D. E. Hev

Level 3 Expert

1059 Answers

Ron Dufek
Ron Dufek

Level 3 Expert

398 Answers

Are you a RCA Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides