Author Topic: Repair faults section  (Read 20401 times)

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buggsy

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Re: Repair faults section
« Reply #15 on: August 24, 2012,15:25:28 »
Hi , a 17PW20 V1 power board in a waltham 32"lcd tv    , standby light on and off constantly , any help would be appreciated.


Thank you

Scouse
check the two 15 nf 630 volt  caps behind large transformer top left of power supply one or both reaad low causes non start or on /off  action normaly blue or grey in colour avialble from ooem supplies donot be tempted to use old one from other supplies as same faults will occure   also small transistor and low value caps go on this board & other versions this kit available from oem supplies.buggsy

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Re: Repair faults section
« Reply #15 on: August 24, 2012,15:25:28 »

buggsy

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Re: Repair faults section
« Reply #16 on: August 24, 2012,15:29:14 »
:brinda:hi ive got a 37" lg lcd tv wich has just went off the power light flashes red and blue any idea

try pressing menu button some time get out of this problem or get into service mode ....soome times error ocurs when caps go faulty on power board  worse case replace 24c64 eprom with preprogramed ic if blank used will program same fault....buggsy

buggsy

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Re: Repair faults section
« Reply #17 on: August 28, 2012,17:23:55 »
have you checked the diode and resistor on either side of mains votage capactior




regards.....buggsy
:sign0144:

Hi everyone I have read a few subject threads about flashing standby lights and have replaced the caps and hey presto - Standby light still flashing what else do i try? any info would be appreciated.

chris
:051bye:

Mulja tv repair portal

Re: Repair faults section
« Reply #17 on: August 28, 2012,17:23:55 »

buggsy

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Re: Repair faults section
« Reply #18 on: August 28, 2012,17:27:49 »
Hi , a 17PW20 V1 power board in a waltham 32"lcd tv    , standby light on and off constantly , any help would be appreciated.


Thank you

Scouse
  :051bye: check your 15 nf 630 volt caps behind main transormer and 50 volt 1000 uf electrolitic cap on lower left power board

jfoster27

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Re: Repair faults section
« Reply #19 on: September 01, 2012,05:03:06 »

Sanyo CE32LD81

The set has a shadow on the left side about 50mm from the edge, its like a tide line on the beach going down the screen.
Its only on fairly dark scenes

Any ideas

buggsy

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Re: Repair faults section
« Reply #20 on: September 19, 2012,09:58:56 »
:sign0144:you need a repair kit to repair your power supply several components damaged including tranisistors and two smd diodes & a resistor on the underside kit cost around 29.00 or so
topside
from oem supplies

Hi everyone I have read a few subject threads about flashing standby lights and have replaced the caps and hey presto - Standby light still flashing what else do i try? any info would be appreciated.

chris

Mulja tv repair portal

Re: Repair faults section
« Reply #20 on: September 19, 2012,09:58:56 »

mtsilis

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Re: LG LCD
« Reply #21 on: May 30, 2014,17:31:35 »
HI GUYS,I HAVE A 42INCHES LCD TV MODEL NO 42LC2RR AFB
FAULT:no start up.stand by led flashes from red to green.
any help...............
check the smd fuses in the inverter bord

RenegadeUK

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Re: Repair faults section
« Reply #22 on: November 14, 2014,06:27:52 »
Hi i was hoping someone might be able to help.

I have a Philips LCD TV  (model no 37PFL5522D/05) and it recently started switching on and off even though the BLUE POWER light stays on (so it is not switching off to StandBy mode, which would show a RED light). 
It generally works ok after 10-15 minutes, although it now seems to takes longer and longer to warm up/stay on.

I've inspected all the capacitors on the Power Board (PLCD300P3 24572) and they seem fine, although the main power Capacitors are under a black protective cover and some are also under a large heatsink. (see attached picture).

Could these be the cause of the problem, and how could i inspect these?
The large covered heatsink has 4 diodes stuck to it (connected with thermal paste) which would make it difficult to remove.  I can just about see the capacitors under the covers and they don't seem to have bulged or popped.

I would be grateful of any help, as i'd much rather replace any faulty components than order a new power board etc..

Can anyone recommend a possible fix. Thanks in advance for any information.
« Last Edit: November 14, 2014,13:04:55 by RenegadeUK »

call me al

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Re: Repair faults section
« Reply #23 on: November 24, 2015,11:06:24 »
great to see forum back, is it here to stay , :72:hope so

smallal

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TOSHIBA 40BV700B FIRMWARE?
« Reply #24 on: January 10, 2016,06:42:19 »
40BV700B flashing light, (VESTEL 17MB35-4)
PSU has been tested on another set & is ok, so my guess is it's corrupted firmware.
Trouble is I can't find the firmware for this set anywhere.
Does anyone out there have a copy?
Many thanks.

 

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