Hi repairing this tv for a friend strange red lines going across the screen
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Re: Hitachi l42vp01ub
LVDS fully seated? check both ends.
Happens on only one/a few sources or all sources?
Does it affect menu/volume control?
PSU 12V & 5V are 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. -
Re: Hitachi l42vp01ub
Strange my friend told me the the avi and hdmi gave the red lines but the pc lead was fine
12V is 11.7
5V is 4.8
But just removed the cover and running it and all inputs are fine no more red lines ?Comment
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Re: Hitachi l42vp01ub
Ok all back together now I suppose I'll run this a few days to see if it does it again very strangeComment
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Re: Hitachi l42vp01ub
...a problem that goes away on its own is also bound to come back on its own.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: Hitachi l42vp01ub
agreed so what you think is the next option ?Comment
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Re: Hitachi l42vp01ub
Ok after the set warms up the audio keeps cutting out then back with a popping noise from the speakersComment
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Re: Hitachi l42vp01ub
I've had this before. Fix:
https://www.youtube.com/watch?v=p0PRbDme8cs
Shitty Vestel.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: Hitachi l42vp01ub
Thanks tom ill check out the video then test it,I luckily have a spare of everything from this model due to a cracked screen TV so...Comment
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Re: Hitachi l42vp01ub
A friend of mine also happens to have all the boards from this set. Funny story, we fixed that for him but a month later he decided he wanted to upgrade so he dropped it off the cabinet, smashed it and claimed on his house insurance.
I'm sure it doesn't work out in the long run, some people are really stupid. At least it was free.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: Hitachi l42vp01ub
Oops
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Re: Hitachi l42vp01ub
It was most definitely a deliberate act, makes me kind of sad, might only be a shitty Vestel but still a waste.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: Hitachi l42vp01ub
ok turned on the tv this morning red lines are back checking voltages ive noticed the pl802 on the schematics im only getting 22.2 volts compared to 24 volts and the main cap on psu im only getting 330vAttached FilesComment
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Re: Hitachi l42vp01ub
How's the 12V & 5V?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: Hitachi l42vp01ub
picture attached the 12v are reading lowAttached FilesComment
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Re: Hitachi l42vp01ub
You have a PFC fault...I've had two like this and never fixed them. I'm sure it is fixable I just haven't invested the time.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: Hitachi l42vp01ub
ok so ill search around for a replacement psu ?Comment
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Re: Hitachi l42vp01ub
try replacing your filter cap,they can cause drops in output voltages aswell,if the pfc circuit is underpoweringfixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!
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please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!Comment
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fixed so far...376 lg lcd tv's,24 onn tv;s,24 panasonic lcd,16 jvc lcd,12 marshall jcm800 amps,refurb of various disco equipment lighting,old style disco decks ,and a flymo!
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please let us know if everything works ok if your tv gets fixed, as it will be and aid for anyone else having the same problem and wishing to fix it.it would save people clogging up this site with topics that are duplicated,and can be found easily using the search function.,and taking up valuable space.enjoy your fixed tv!,hopefully!Comment
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All left and right refers to looking from rear of TV (or looking from front with TV upside down)- TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
- Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
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As stated by the person I collected the TV from, it just stopped working overnight. However, I still gave it a go to try and repair it.
There is a thread on the same TV but with slightly different issues where they had to tape connection points on the ribbon cable, so I want to see if this is repairable by any chance.
After bringing it home and plugging it in, the TV turned on with its backlight working but had no picture. After removing the back cover, the first thing I tried is to unplug one of the ribbon cables and the situation is as follows.
Left... -
Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed... -
Hi all
I have lines on the screen...which is an age old problem that can be remedied by watching Youtube videos and getting out the tape.
My issue (after successfully fixing a different sammy tv with a separate tcon board and isolating the side of the panel...):
This tv has an integrated tcon...so it is a bit more confusing when trying to isolate the clocks.
It has a c ribbon and i have taken each end out to see if that will isolate the lines. instead, it makes it much worse ALL over the tv!
So....i don't know what end of the C ribbon to work with... -
Hello,
First of all I'm new here. While looking I found this amazing forum and I'm very happy I did. Now for my problem:
I picked up a Samsung UHD QLED QE50Q67TAU from 2021 for $50 knowing it was defective. The seller said it had black lines and that it could get stuck in boot randomly.
I've tried a new power cable, hard reset, opening up and jiggling all cables, pressing everywhere to see if I get a reaction but I've gotten nothing. I've tried the tape method but I've only managed to get the lines worse.
I'm no expert but I've done the tape...
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