Re: vizio e321vl no 12v
Couldnt find p_on or Q1, but measured all the mosphets that were labeled Q##, and all looked good.
Couldnt find p_on or Q1, but measured all the mosphets that were labeled Q##, and all looked good.
-
-
Re: vizio e321vl no 12v
A diagram would help. I dont see Q1 anywhere. Theres a Q14 near the main connector, and thats it.Comment
-
Re: vizio e321vl no 12v
Clear sharp pictures of your board would have be extremely helpful however looking at the one that Budm posted, I've circled the 3 transistors/mosfets that could be checked for short circuit. See if you can trace the connection from the the Remote ON/OFF pin to one of those 3 devices.Attached Filesif you find these attachements useful please consider making a small donation to the site
Willing to help but I'm no expert.Comment
-
-
Re: vizio e321vl no 12v
Ah ok, thats underneath the power supply board. I thought we were still on the main board.
Ill check it when i have some downtimeComment
-
Re: vizio e321vl no 12v
Sorry Kevin
Ignore my previous post. The low resistance is on the mainboard not the power supply board and I'm getting myself mixed up.
Its a clear photo of the underside of the main board at the connector to try and work out where the Remote On/Off connects to is what I'm after. That is the pin which is showing almost a short circuit, isn't it?Willing to help but I'm no expert.Comment
-
Re: vizio e321vl no 12v
The pics budm posted are the top and underneath of the power supply board. Ones i posted are of just the top of the main board.
Attached is the underneath of the main board.
There are only 3 mosphets at the lower right corner (Q42, Q41, and Q18)Attached Filesif you find these attachements useful please consider making a small donation to the site
Comment
-
-
Re: vizio e321vl no 12v
I can't read the component numbers but it would be worth checking the 3 pin devices shown in the photo.Attached Filesif you find these attachements useful please consider making a small donation to the site
Willing to help but I'm no expert.Comment
-
-
Re: vizio e321vl no 12v
Finally got some time to check the tv.
In the first pic you showed 3 mosphets to check resistant on (Q250, Q251, Q203), Q250 and Q251 checked fine. Q203 however showed an openon 2 of the 3 legs.
On the second pic where you highlighted 6 mosphets on the top of the mainboard, those all show fine.
Edit: traced the traces from the remote on/off, and the open mosphet is what is on that circuitLast edited by kevin.st56; 09-25-2016, 08:02 PM.Comment
-
Re: vizio e321vl no 12v
just letting everyone in this old thread know that i fixed the tv by replacing the main control board.
although there were no noticable damage on the board, something somewhere was damaged, and i simply replaced it with a known working one from ebay.
thanks everyone who contributed to this thread.Comment
-
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... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
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
-
Hi There,
This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.
After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.
More Details
TV Model - LG OLED77G1PUA
Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt... -
Hi everyone,
I am trying to fix a samsung washinmachine power supply main board.
I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
The power supply board reference is the following: DC41-00189a
I have followed one thread (https://www.badcaps.net/forum/troubl...ingmachine-rel...
Comment