Re: LG 37LC2D No picture, believe bad power supply
Anyone can help please
Anyone can help please
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Re: LG 37LC2D No picture, believe bad power supply
I do not know then what the problem is, but I can suggest a work-around. That is to use one of these modules:
http://www.ebay.co.uk/itm/LM2596-DC-...item1e79c56663
You can rig it up to output 3.4V from e.g. the 12V or 24V rail.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 37LC2D No picture, believe bad power supply
ok thanks... but I still have to fix that lines problem.. so I will assembly whole tv and check LVDS signals on T-con.§
If I have sound ok but on screen half black and half lines its not related to low 3,4V rail even when i boost it with external power supply to 3,4V ok. So?Comment
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Re: LG 37LC2D No picture, believe bad power supply
The 3.4V may power some video processing on your model, so maybe it could cause the lines on the screen, you really cannot know until you get the outputs from the power supply stable.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 37LC2D No picture, believe bad power supply
So the injected external 3,4V it doesnt to be 100% ok? It looks stable and ok real 3,4V I tested with multimeter for proove.Comment
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Re: LG 37LC2D No picture, believe bad power supply
Oh, I didn't realise you did that, it's been a long time. That would seem to indicate LCD/t-con fault.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 37LC2D No picture, believe bad power supply
finaly have got screen working ok looks like there was some humidity that cause problem on screen (friend bring it to me in rainy day only TV in towel)
ok.. so I have picture and sound working ok, but the first problem is still there, HDMI, RGB (VGA) inputs are not working.. TV show no signal only.
scart and analog, and TV antenne works ok picture and sound....
With 3,4V injected and working ok no change still HDMI and RGB no signal.Comment
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Re: LG 37LC2D No picture, believe bad power supply
Can you supply a picture of your main board?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 37LC2D No picture, believe bad power supply
http://flattvparts.co.uk/bmz_cache/d...ge.530x520.jpg
bigger http://flattvparts.co.uk/bmz_cache/4...e.1000x982.jpg
i will do better laterLast edited by godzzila; 05-25-2013, 05:51 AM.Comment
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Re: LG 37LC2D No picture, believe bad power supply
There are voltage regulators on there, have you tested any?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 37LC2D No picture, believe bad power supply
yes tested all are okComment
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Re: LG 37LC2D No picture, believe bad power supply
Including the 5 pin ones?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 37LC2D No picture, believe bad power supply
didnt test that ones yet.. which should i test first.. i think that I need search for datasheet on each for verifie?Comment
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Re: LG 37LC2D No picture, believe bad power supply
Yes, just read the numbers off and search for them, or post them here and we will look for datasheet.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 37LC2D No picture, believe bad power supply
all 5 pin regulators and stabilizators work ok checked good acording to datasheetsComment
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Re: LG 37LC2D No picture, believe bad power supply
All works ok except RGB and HDMI... TV says NO SIGNAL on these inputs.
RGB go to VCT-IP directly and HDMI go to AD9381 and then to VCT-IP.
VCT-IP is a main one with small heatsink...
So how can I check VCT-IP if its bad?Attached FilesComment
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Re: LG 37LC2D No picture, believe bad power supply
VCT-IP looks to drive the LCD panel; it is unlikely that it is bad on two inputs but nothing else, since it is still driving the LCD properly.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 37LC2D No picture, believe bad power supply
Yes its main video chip as well as drive audio too. So what could be bad? No RGB and no HDMI.Comment
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Re: LG 37LC2D No picture, believe bad power supply
I am still wondering if there is some software or EEPROM problem. I am sorry but I can't offer much advice on how to narrow it down further.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 37LC2D No picture, believe bad power supply
Problem was that TV was freezing on RGB input after some time... so it was working but freezing I think that because low 3,4V rail.. so the friend bring it to me but I had a problem with screen lines and no picture (because moisture)... and now TV not work on RGB or HDMI... -> NO SIGNAL
So may be ICs (or something else WHAT?) become damaged because low 3,4V rail?... If I inject 3,4V and got it stable nothing changed still no signal.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
Opened it up and discovered the power supply is making a faint clicking or ticking sound.
I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles... -
I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: https://www.badcaps.net/forum/showth...light=820-3662 . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But another problem...
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