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Hi to all Need help with this power supplymlt668tl . When the TV was in STBY, the red LED turn green but the TV is off. I checked the power and found that the 5Vstby is ok

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Shuttle83
  • 1139 Answers

SOURCE: Coleman 1500 power inverter has no output

I believe that the actual unit may have other problems and that you will need a schematic to aid in your troubleshooting of this issue. Once you have the schematic and a multiment you can check the voltages to see if things ar as they should be and then we can look at what is happening.

Posted on Sep 08, 2007

  • 579 Answers

SOURCE: Hitachi 32LD8700 - TV won't turn on although has power

The general problem with LCD type TV's is that the power supply fails. They are very sophisticated designs that are difficult to troubleshoot and generally best to just replace the module, but sometimes there is visible damage in some of the electrolytic capacitors (visibly bulged) and high voltage rated parts can be substituted.
Hope Ya Fix It

Posted on Feb 10, 2008

toddg
  • 171 Answers

SOURCE: TV lost power - Protect LED D912 blinking

Symptom: BLOWS E994
Cause: DEFECTIVE D604
Symptom: BLOWS I401 EVERY FEW WEEKS
Cause: DEFECTIVE C410
Symptom: DARK PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: DARK PICTURE
Cause: DEFECTIVE C724
Symptom: DIGITAL CONVERGENCE WON'T ADJUST
Cause: DEFECTIVE DCU
Symptom: E994 KEEPS BLOWING
Cause: DEFECTIVE C701
Symptom: INTERMITTENT COLOR ON ALL INPUTS
Cause: DEFECTIVE IY01
Symptom: INTERMITTENT REMOTE FUNCTIONS
Cause: DEFECTIVE IR HM01
Symptom: INTERMITTENT REMOTE FUNCTIONS
Cause: DEFECTIVE D029
Symptom: INTERMITTENT VIDEO
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: LOSS OF SYNC
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: NO AUDIO
Cause: NEED TO RESET EEPROM I004
Symptom: NO CLOCK/SLOW CLOCK/CAN'T ADJUST CLOCK
Cause: DEFECTIVE D031,R0H8,Q018
Symptom: NO CONTROL OF BLUE COLOR
Cause: DEFECTIVE D511
Symptom: NO FRONT CONTROLS FUNCTIONS/REMOTE OK
Cause: DEFECTIVE DM04
Symptom: NO HOR SYNC
Cause: DEFECTIVE I008
Symptom: No Horizontal Sync. When PinP is called up, main picture may lock up for a 8 moment, then it goes back out of sync.
Cause: I008 defective (Sync Switch)
Symptom: NO LEFT CHANNEL
Cause: DEFECTIVE I401
Symptom: NO OSD
Cause: DEFECTIVE D716
Symptom: NO OSD
Cause: DEFECTIVE I102
Symptom: NO PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: NO POWER
Cause: DEFECTIVE I912
Symptom: NO REAR AUDIO
Cause: DEFECTIVE IS11
Symptom: NO REMOTE FUNCTIONE/FRONT CONTROLS OK
Cause: DEFECTIVE IR HM01
Symptom: NO REMOTE FUNCTIONS/FRONT CONTROLS OK
Cause: DEFECTIVE DM11
Symptom: NO SOUND
Cause: DEFECTIVE I401
Symptom: NO TUNER AND ALL INPUTS
Cause: DEFECTIVE IYO1
Symptom: OSD LATCHUP
Cause: SEE PTV98-4B
Symptom: PICTURE PULLS
Cause: DEFECTIVE D702,D703,D704
Symptom: RANDOM CHARACTERS ON SCREEN
Cause: NEED TO RESET EEPROM I004
Symptom: REPLACED DCU/RECONVERGED/NO MAGIC FOCUS
Cause: DID NOT INITIALIZE SENSORS
Symptom: RK46 VERY HOT/STK'S HAVE BEEN REPLACED
Cause: DEFECTIVE DCU
Symptom: SHUTDOWN
Cause: DEFECTIVE I401
Symptom: SHUTDOWN
Cause: DEFECTIVE I601
Symptom: SHUTDOWN
Cause: DEFECTIVE C715
Symptom: SHUTDOWN/OPEN E995,E996
Cause: DEFECTIVE T702
Symptom: SMEARED PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: SNAPS/BLOWS Q777
Cause: CRT ARCING
Symptom: WEAK COLOR
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: WON'T HOLD CHANNEL MEMORY
Cause: NEED TO RESET EEPROM I004
Symptom: WON'T HOLD CHANNEL MEMORY
Cause: DEFECTIVE EEPROM I004
Symptom: NO AUDIO
Cause: Q013
Symptom: SHUTDOWN
Cause: Q777,I901
Symptom: SHUTDOWN
Cause: E994,D724

Posted on Sep 29, 2008

toddg
  • 171 Answers

SOURCE: KV-32s66 Flashing stby timer LED- no pic no sound

Your IK video path is defective,also check recheck IC601,R607

Posted on Oct 09, 2008

  • 197 Answers

SOURCE: tv won't turn on - power SUPPLY OK

bad main pcb

Posted on Jun 07, 2009

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1 Answer

TV cannot turn on


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Action-3: Replace the main board!!!

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check for any short circuit on the board.

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Hitachi 55in plasma TV, model 55HDS69. It will not power up from either the remote or the on/off switch on the side. The TV was used a lot, for more than 5 years. It shut off while running. The red...


Hi sir Jim!!!!



kindly check the 5 LED if there is lit lights to diagnose where the fault came from..You said the 5 led turn off for 1 -2 seconds it means no error but still won't turn on I think there sometime wrong on logic circuitry..


1_20_2012_6_55_00_am.jpg

Try to read the voltages on highlighted words on picture of block diagram above such as vs,va,vcc,stby+5v,stby+3.3v,+5.5,+10.5 and +12v...

After that let me know the results to diagnose where the fault from..

Hope it helps...

chester..

Jan 19, 2012 | Hitachi 55HDS69 55 in. Plasma Television

2 Answers

I try to turn it on but it just blinks on stand by


Probable Lamp. If lamp hasn't bown the red Lamp Lite won't flash but other lamp issues cause stby timer light to continue flashing. If stby red lite is flashing, count the no. of times flashing - could open thermal fuse (6X flashing)

Nov 27, 2009 | Sony KDF-E42A10 42 in. LCD Television

1 Answer

When I turn on the tv, green light blinks for a


Its your ballast. it has as short. i recommend changing the ballast. while you are inside the set, i would run a break point test on the power board to be safe but, im sure its the ballast.

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2 Answers

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yes but you have to open the tv

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The tv not not power 0n dead set,1 ic blown out stby sw,how I can fix the board.Thank you.

Jun 21, 2008 | Vizio L32 32 in. LCD HDTV

1 Answer

4a fuse blown


1)pull chassis.remove power PCB==the one with large heatsink w/convergence IC's on it 2)Observe four regulators also on same heatsink Remove solder from all reg. pins-clean PCB 3)Resolder 4)solder any/all bad connects 5)replace 4 amp fuse 6)reassemble & test

Oct 05, 2007 | Pioneer SD-533HD5 53" Rear Projection HDTV

2 Answers

Progressive power up problem


Yeppers. Sounds like the standby power supply has a bad capacitor in it and the regulator Ic is defective. These parts should only be replaced by quilified technician as there is very high voltage inside these sets. Good Luck

Jun 14, 2006 | JVC AV-K29MX1U 29" TV

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