Re: LG 50PA4500 Clicking troubleshooting HELP please...
Yeah m-on and stby
Sometimes it's printed a bit clearer on the underside of the board.
Yeah m-on and stby
Sometimes it's printed a bit clearer on the underside of the board.
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
I'd like to pick up where this thread left off: got the same model LG with the same symptoms. PSU P/N:EAY62609701
Have disconnected all cables to psu except line voltage and jumped M.ON to STBY
The relay clicks twice and there are no output voltages except 5.2vdc STBYComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Do you have a way to take an up close picture of your TV's power supply ?Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Both sides?Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
My psuAttached FilesComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
...and thisAttached FilesComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Replace C802 Capacitor (circled in the photo below) It can be found on ebay.
223J@1250V HIGH PULSE. If your unable to perform this repair I can assist you if needed.
Last edited by Brentsky; 02-17-2015, 03:53 PM.Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
By the way this is turning into a common problem with this model of power supply.Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Thanks for the info very useful. The poly cap in a lot of these half-bridge type power supplies is a frequent failure. Some models seem immune and yet others have tons of issues. Wonder why, seems like it might be a parts sourcing/quality issue rather than a design issue. Have seen 15+yr old PSUs with those caps still OK.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
So it looks like that cap is a .022uF @ 1.25kvdc pp. I'm not partial to eBay so ordered a hopefully suitable substitute from digikey last night; should be here by end of day... we will see if that's the fix...
Thanks guys!
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
What's the part number for that cap?Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Like I said its a substitute, here is the data sheet:
Maybe one of the more knowledgable guys can review this...
Part# is B32612A7223J008 it's rated high pulse and application include SMPS, I've got 10 coming and will post results but caution you to use at your own risk.
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
I haven't even taken c802 off of my board yet to test it...Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Ok the new caps arrived; took out c802 and tested it-nfg
Checked the new cap- on spec@ .0215uFAttached FilesComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Ok new cap in and board remounted in chassis...
Left all cables but AC disconnected.
Powered up psu-ONE RELAY CLICK!
Checked voltages at main cap- ~390vdc
Jumped M-on to STBY, all voltages including VSTP & VATP check out.
Power down, reconnect Y&Z sus cable and main board cable.
Plugged it back in and it Works!
Attached FilesComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Nice fix, thanks for sharing!Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Thank you brentsky for this solution!
Still not sure of the compatibility of the substitute cap- but so far so good-Comments?
Attached FilesComment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
i cant post a new topic as im a new member but
I have a 60PA6500
It switches between either
*constant relay click
or
*stuck in some standby mode where the screen is on but blank , power LEF is red and control board D101 Led blinks fast then slow then pauses
weird thing is every now and again the TV works fine for a few days then back to this.
when its in its constant relay click boot it will do this with just the power and main board connected and all other boards unplugged
any help an ideas?
POWER SUPPLY EAX64276701/11 EAY62609801Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
i have completed an auto gen test and the screen cycles through different colours, so from what ive read that means its a mainboard problem?
what can i test on the main board?Comment
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Re: LG 50PA4500 Clicking troubleshooting HELP please...
Mainboard is an EAX64696607 (1.0)Comment
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PSU - BN44-00878A
Symptoms:
The TV turned itself off, and I haven't been able to turn it back on. The standby voltage was unstable and lower than it should be.
A weak clicking sound was coming from the transformer.
Video with clicking sound:https://www.youtube.com/watch?v=lAduhjNtqCA
Progress:
After the transformer, I measured four Schottky diodes. DM862C and DM864C diodes readings were 003 in both directions. After detaching them from the circuit and measuring them, DM864C was the shorted one. These Schottky diodes are SB550.I... -
Hello from France,
mon2 kindly advised me to post a thread to ask the question(s) I'm concerned about. I'm new to the forum and I'm looking for practical courses for troubleshooting pc motherboards especially laptops in Europe, if possible in France. I have been a computer network system administrator and a corrector of administration modules for automated programs under Unix. But I really miss the practical "ops" side of troubleshooting. So I would like to start from the beginning: 1.8V, 3.3V, 5V and 19V tests for example, etc...
Do you think this is feasible for me? I... -
Hello, I bought this Mac from a friend, he said that it simply stop working. The MacBook looks very clean but does not power on, stuck on 5v 0.42A, and sometimes display 5V and 0A (then 0.071A and again 0A).
I opened it looking for some problem, it was not touched before for sure and the board is very clena, no spot of corrosion at all from what I can see. Voltage on multimeter of the board off the case it's the same, 5V 0.42A. But then I noticed this "clicking sound" come from the board ( I attached here the audio file).
Looking on google I found this:... -
I gotten a Carver CM-1090 amplifier from a friend who has kept it in storage for decades. Opened it up, thick layer of dust cumulated everywhere. Vacuumed it semi-cleaned, and blown off as much as possible the remaining dust. This is a 220V version.
On initial powered up with nothing connected - it works with all the lights and button indicator lit up as pressed, etc. I then powered off, connected a CD player into the CD RCA input and powered it on. It seemed to work for a short while and when I turned the volume up and down to see the the VUs works, the power started to clicked off... -
The issue with this video card is the HDMI port. Specifically on pin 19 (Diode checks on all other pins are normal). When i do a diode check on it from the pin on the board itself, I have nothing. There is also no short on the pin. Resistance reads about 200k. Normally on any HDMI pin 19 I would expect some voltage drop anywhere from .5v to 1.2v but here, I have nothing. The card is operational and can be used via the displayPort ports, but not through the HDMI. Attached you will find the pdf schematics for the card on page 22. I have verified that all of the resistors on this line before the...07-25-2024, 09:49 AM
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