I've just had apart above TV and found one blown cap and faulty bridge rectifier. So replaced both and now TV red light flashes once and 4 green.
Anyone have any ideas what I can check next.
Anyone have any ideas what I can check next.
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Re: Lg 42lf65 flashing red green light
I'm getting 5v at the pwr. And when shorted I get 6.5v at the 6.5pin and 0 at the 3.4v on pin. -
Re: Lg 42lf65 flashing red green light
Are you getting a power on signal from the main board? (Marked PS ON, or ON/OFF)Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Lg 42lf65 flashing red green light
Yes 5v at the pwr pinComment
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Re: Lg 42lf65 flashing red green light
So, that means the power board is faulty.
Got any pictures of it?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Lg 42lf65 flashing red green light
http://i989.photobucket.com/albums/a...oads/image.jpg
Won't let me add via attachments due to being on my phoneComment
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Re: Lg 42lf65 flashing red green light
Is that fuse near the big 450V caps OK?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Lg 42lf65 flashing red green light
Yeah tests ok.Comment
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Re: Lg 42lf65 flashing red green light
Ok, measure volts DC from each red point to the black recessed solder point, you may find you need to solder a wire to this point to make an accurate measurement. Use highest DC range. Expect around 380-400V when the power supply PWR signal is high (>2V)
Caution: High voltage! Do not touch any part of the primary side which you are testing while it is powered on! Discharge 450V caps before soldering. I recommend someone should watch you whenever you do primary side/high voltage testing.Attached FilesLast edited by tom66; 05-09-2015, 02:43 PM.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Lg 42lf65 flashing red green light
I just plugged in to test what u said and the dam things working. Very weird.
So turned it off and bk on and I won't come back on.Comment
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Re: Lg 42lf65 flashing red green light
Getting 874 at those pointsComment
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Re: Lg 42lf65 flashing red green light
Check again, as that is definitely not correct.
If still high: Check meter is on DC range, and check meter battery is fresh.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 42lf65 flashing red green light
What a noob. Had on wrong setting. Can tell I'm new to this.
This time I got 397.Comment
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Re: Lg 42lf65 flashing red green light
Good, that's correct then. PFC circuit is working (boosting 320VDC to 397VDC) and power board is registering power on signal from main board.
I take it's 397V both sides?
What's the part number of that device mounted on the heatsink just left and to the top of that fuse you were measuring from?Last edited by tom66; 05-09-2015, 03:51 PM.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 42lf65 flashing red green light
Pqnk65zfp
Gkdkn. Vw
Chn 710
I could be wrong as very hard to see.Comment
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Re: Lg 42lf65 flashing red green light
Just a MOSFET.
I'm going to need a pic of the board under that MOSFET.
Can you upload it to this site using Manage Attachments feature - tinypic is horrible.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 42lf65 flashing red green light
turned it on this morning and it working fine, turned it off and again wont turn on, green light just flashes
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Re: Lg 42lf65 flashing red green light
Sorry - I meant the underside, the green side of the board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Lg 42lf65 flashing red green light
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Re: Lg 42lf65 flashing red green light
Is there any way you could get a higher resolution - I need to be able to see the small circuit components.
And please use Manage Attachments or imgur if you have to use a file hosting site (Photobucket deletes files often)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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Hi
Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.
Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.
The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.
I have already tried replacing all of the... -
Hi
Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.
Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.
The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.
I have already tried replacing all of the... -
Hi
I have an 820-2610-A motherboard that has no green light.
I have noticed is when I do a SMC reset the light on the Magsafe blinks.
From My understanding, the sys onewire circuit is responsible for the green light on the magsafe
The sys onewire circuit on this model and others is more involved
I was hoping if anyone knows about this and how it works, can reply and let me know
I know this is an old model but I am sure there are people who still works on these or knows about them
I get 1.1v on the C7771 capacitor and will replace... -
Hello everyone.
This is my development machine. I've been using it since two years and half without any problem except sometimes it wouldn't wake up from sleep.
Lately the issue became more frequent and powering it up would take few seconds to show the POST screen.
Then the computer refuses to power on at all. Now only the caps lock button flashes 7 times then stops. The charging light is always on whenever a power source is connected (battery or charger).
I tried long pressing on the power button, after several seconds it would go off then when the button is released... -
Hello Community!
CASE DETAILS
Promblem Signs: Backlight on 1 sec off 7sec > repeat && Red standby light: 1blink, off 3 sec, 2 blinks, off 5 secs, 2 blinks, off 3 sec, restart cycle
13V present on powerboard output. Backlight continues flashing after removing cables to pannel one at a time and even with both disconnected. NOTE: backlight STOPs flashing and remains on when connector between powerboard and mainboard (note Tcon built in) is disconnected.
Tried inserting firmware on USB and left it in for a few hours, but no change
...
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