Mulja tv repair portal

Equipment Repairs => LCD TV forum => Topic started by: mulja on May 16, 2008,10:55:42

Title: Repair faults section
Post by: mulja on May 16, 2008,10:55:42: Added repair faults section

You can post your own (Tv, Lcd, Plasma, Dvd, Video, Music, Mp3 etc...) Faults

Direct to Repair faults section and easy search......

Any new ideas VERY WELCOME

Link:

http://www.tv.quuq.org/index.php?ind=tips
Title: Re: Repair faults section
Post by: mrchips on September 25, 2008,12:41:54: :brinda:hi ive got a 37" lg lcd tv wich has just went off the power light flashes red and blue any idea
Title: Re: Repair faults section
Post by: jima1vespas on May 27, 2009,11:30:08: humax lgb-19dzt stuck in standby any ideas?
Title: Re: Repair faults section
Post by: gibbos23 on June 18, 2009,05:40:46: One i (i32D) stuck in standby any help,thanks. :wallbash:
Title: Re: Repair faults section
Post by: scousethief on June 24, 2009,14:58:24: 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
Title: Re: Repair faults section
Post by: videoman on November 20, 2010,08:49:27: Up to now 90% of all my faults I have come across in LCD TVs are the usell suspects ,The caps ,normally in the secondry section!
Title: Re: Repair faults section
Post by: davidp04 on April 08, 2011,02:18:05: I Have a Vizio E550VA, Audio on tv is going up and down and getting really bad back ground noise over the via cable box, any idea???
Title: Re: Repair faults section
Post by: maldrini on August 20, 2011,10:25:39: I have problem with a Seg LCD it has a power supply 17pw20 and a mb22-2336974 controller it's not starting up it gives me the red light when i power up it shutdowns imediatly and no light a nothing can you help me . .. :(
Title: Re: Repair faults section
Post by: meerkatmtd on September 15, 2011,11:00:48: :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
Title: Re: Repair faults section
Post by: Malcolm on November 20, 2011,13:06:04: Does any one know if TV Tony is still available re 3251 power supply problems.
As many others, the photo of Alun's board could be mine.
Malcolm
Title: Re: Repair faults section
Post by: Bambooz on November 20, 2011,23:33:50: Quote from: meerkatmtd on September 15, 2011,11:00:48
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

the FSP212-3F01 psu is notorious for blowing other parts when the caps go pop.
see attachment (which is a general "fix-all-possible-problems-at-once" kinda thing. check the parts first if possible)
If you can't get it fixed, i've got one collecting dust somewhere (out of a noname 32" tv with cracked panel)

edit: :oops: .. didn't notice how old that post was
Title: Re: Repair faults section
Post by: meerkatmtd on November 21, 2011,12:49:26: that's alright the tv is still not working, think will source a replacement power board, have seen one online for £55 so might get it fixed, in the mean time i got my hands on a new cheap lcd. thanks for you post at least interesting that could almost be any part on the board that could be a fault?
Title: Re: Repair faults section
Post by: sabre504 on February 21, 2012,19:02:33: HI if you still have the psu
replace all the caps on the secondary side not just the 2 1500uf
Change Q7 ( bc848 ) and ZD4 15 volt zener diode as a start point usually fixes
Title: Re: Repair faults section
Post by: denniswu163 on March 06, 2012,05:01:03: the FSP212-3F01 psu is notorious for blowing other parts when the caps go pop.
Title: LG LCD
Post by: COWBOY on June 14, 2012,18:45:06: 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...............
Title: Re: Repair faults section
Post by: buggsy on August 24, 2012,15:25:28: Quote from: scousethief on June 24, 2009,14:58:24
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
Title: Re: Repair faults section
Post by: buggsy on August 24, 2012,15:29:14: Quote from: mrchips on September 25, 2008,12:41:54
: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
Title: Re: Repair faults section
Post by: buggsy on August 28, 2012,17:23:55: have you checked the diode and resistor on either side of mains votage capactior

regards.....buggsy
Quote from: meerkatmtd on September 15, 2011,11:00:48
: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:
Title: Re: Repair faults section
Post by: buggsy on August 28, 2012,17:27:49: Quote from: scousethief on June 24, 2009,14:58:24
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
Title: Re: Repair faults section
Post by: jfoster27 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
Title: Re: Repair faults section
Post by: buggsy on September 19, 2012,09:58:56: Quote from: meerkatmtd on September 15, 2011,11:00:48
: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
Title: Re: LG LCD
Post by: mtsilis on May 30, 2014,17:31:35: Quote from: COWBOY on June 14, 2012,18:45:06
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
Title: Re: Repair faults section
Post by: RenegadeUK 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.
Title: Re: Repair faults section
Post by: call me al on November 24, 2015,11:06:24: great to see forum back, is it here to stay , :72:hope so
Title: TOSHIBA 40BV700B FIRMWARE?
Post by: smallal 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.
Title: Re: Repair faults section
Post by: promo7uk on June 27, 2019,16:50:25: Quote from: videoman on November 20, 2010,08:49:27
Up to now 90% of all my faults I have come across in LCD TVs are the usell suspects ,The caps ,normally in the secondry section!

firmware on main vestel.. either bad mboot loader, or failed flash.. cant remmember if these are just a simple epprom or nand,,

or both,, normally.. eeprom contains mboot and fails.