Re: Proscan LED 32" TV not working.
Voltage Regulator (LDO) testing:
https://www.badcaps.net/forum/showthr...999#post300999
Voltage Regulator (LDO) testing:
https://www.badcaps.net/forum/showthr...999#post300999
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Re: Proscan LED 32" TV not working.
I checked the fuse and it was good. Here is the readings from the regulators.Attached Filesif you find these attachements useful please consider making a small donation to the site
My Spelling and Grammer Sucks.
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Re: Proscan LED 32" TV not working.
this looks like an adjustable regulator, so output should be 1.25v above ground voltage.
if it is a 3.3v regulator, (can't read bottom line on ic) then it is out of spec as well.Attached Filesif you find these attachements useful please consider making a small donation to the site
Last edited by attainteddragon; 05-27-2017, 02:34 AM.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?Comment
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Re: Proscan LED 32" TV not working.
if this was my tv i would try and source a replacement mainboard, as long as it matches the numbers on any stickers on your old main board and also matches the lcd panel used in your tv (white sticker on metal tv chassis usually) it maybe the best route too go, as you may replace that regulator then have a eeprom/spi flash ic issue etc so if you can source a mainboard at a good price with returns policy if faulty on arrival i would buy one.Comment
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Re: Proscan LED 32" TV not working.
Looks like input to first reg. 5.03v and input to third reg. are from same trace but different voltages.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: Proscan LED 32" TV not working.
Sorry its been a few days. Here is what i have so far. BTW the fuse was good. Zoom in to see the readings.Attached Filesif you find these attachements useful please consider making a small donation to the site
My Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
I could have bought one already. I,m being stubborn. I want to repair if a can lolMy Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
well, you will need to change out that regulator to start with.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?Comment
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Re: Proscan LED 32" TV not working.
which regulator are you talking about? Why? I'm not arguing, I'm just trying to understand/learn.My Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
the one i marked earlier as being out of spec.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?Comment
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Re: Proscan LED 32" TV not working.
gotcha thanks. I overlooked the thumbnail.My Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
with that 3rd regulator it does seem odd that the trace at the left regulator is 5v but when it reaches the third regulator on the same trace its down too 3v volts so yes maybe double check voltage readings if still odd maybe change the regulatorComment
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Re: Proscan LED 32" TV not working.
So I know it been awhile but I finely bought a board...... Problem now is the PS board. Ive got one on order but i would like to know what died. At the moment I only have one question. Is it normal for a heat sink to be electrified? IE I'm getting 60 ish VAC on the left heat sink.My Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
yes a lot of power supply heat sinks are live.Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Proscan LED 32" TV not working.
So did you get the TV going by installing the new Main Bd you got? Did the older posts not confirm the PSU was OK? Did you mess with PSU and now destroyed it?Comment
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Re: Proscan LED 32" TV not working.
I changed out the main board with no luck. When it didn't work I checked the output from my PS and and found that there was no voltage. I had voltage up to the transformer so I didn't dig into it too deep. I was going to take the easy quick way out and buy the PS. So now I have another PS and the problem is unchanged. Also there is no stand by light.Last edited by THERED117; 04-06-2018, 01:19 AM.My Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
GFCI is a welcomed idea. lolMy Spelling and Grammer Sucks.Comment
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Re: Proscan LED 32" TV not working.
its odd as in your earlier posts the psu checked out fine but then you say its lost the voltages, so you have now replaced the main board and another psu and still same issues? i would leave your two new boards in if they are the exact same board numbers including any details on stickers etc, then i would re test all the psu voltages and post your results please let us know what it says by each pin and the voltages you are getting.Comment
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Re: Proscan LED 32" TV not working.
Ok. I will as soon as i get a chance this weekend. ThanksMy Spelling and Grammer Sucks.Comment
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Apologies if this is the wrong forum, but I'm not looking for a specific BIOS file, I'm trying to understand how one makes a clean BIOS file. So here's the background. I have 2 HP EliteDesk 800 g2 mini 35w pcs. One is working fine; the other doesn't have display out or working USB's nor does it have any flashing error lights. The CPU does get worm enough to cause the fan to spin up, so I think it's posting, but I just don't know. I had it working at one point but trouble started when I tried to put in a drive caddy that had a cooling fan on it. I thought it would be compatible but wasn't... -
Hello,
i have many 5050sff. all of them, and how i experienced over many years for all about 250 DELLs goin through my hands, are fully flashable and can be serviced in any way when the service_mode jumper is set.
Never ever i experienced problems with that.
Now i have one 5050sff machine, where this jumper isnt working at all.
I do not get the normal messge that the jumper is set when booting and a short test with FPT just confirms this. Everything is locked -->> EVEN for reading !?
The history of the machine is that i used it in my office... -
Hi,
I have the above mentioned bord after repair, which was related to a lot of missing smd devices on the back of the board.
There were almost 20 devices missing, caps, resistors and some diodes/mosfets.
The board is generally working now, all PCIe ports are working, Windows installs normally.
However I have a problem with SATA ports 4-7 (the board has 8 SATA ports) - disks are not beeing recognized by the BIOS neither by Windows (which is usually normal in case BIOS does not recognize them).
The SATA 4-7 driver network is quite simple chipset<->buffers/drivers<->SATA... -
Hi i have one Macbook Air 2020 where touch ID is not working (it's not scanning fingerprints). Touch ID was working before, there is no error message during scanning fingerprint it's just not scanning on screen you can see only fingerprint but there are no red updates as when it's working. Power button is working fine.
I've checked boardview and also schematics but i'm not able to find anything related to TouchID ... i have similar issue on a2338 where there was problem with PP3V0_TOUCHID and after replacing UT610 it was working but here i'm not able to find anything related to... -
Hi masters, I need your help.
I am working on Lenovo Legion 16ITHg6
Motherboard number NM-D721, no BV, no schematic but I am attaching very closes ones.
INPORTANT: My motherboard version is with IT8258 IC, that is controlling keyboard and RGB LEDs.
My problem is on UI142, +3VALW_AG is not stable, floating from 0V to 3,3V.
AGKB_PWR_EN_N signal is floating too (that is why+3VALW_AG not stable).
Power LED is not working as well, power button working well.
UI26 ??? is there any firmware too? Powered by +3VALW_AG.
Motherboard...05-04-2025, 09:35 AM
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