Re: LG 37lv375s no 24V
I would start checking that inv_on line back to the main board
I would start checking that inv_on line back to the main board
-
-
Re: LG 37lv375s no 24V
Follow the wire back to where it comes from, then check the components, If you look at the service manual it does give some direction where to look, search the manual for inv_on or inv_ctl etc. to follow the pathComment
-
Re: LG 37lv375s no 24V
think I found what I needAttached FilesComment
-
-
Re: LG 37lv375s no 24V
Problem is on mainboard....
Comment
-
Re: LG 37lv375s no 24V
I will try to reflow main processor...Comment
-
Re: LG 37lv375s no 24V
You can try forcing on the backlights circuit by disconnecting the INV_ON (BL-ON) wire going back to the main board first then use 1K resistor between BL-ON pin and standby power supply pin to force the backlights on, if the backlights are on but you do not see any video, or sound, or other functions then it has more than just the BL-ON controlling problem.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
-
Re: LG 37lv375s no 24V
Ok guys I replaced main processor ,volltages are same...
I will try forcing backlight with 1k resistorComment
-
Re: LG 37lv375s no 24V
Did you replace the processor or the main board. LV series has bga issues.Comment
-
Re: LG 37lv375s no 24V
ok guys it turn on backlight with 1k resistor
but no picture or soundComment
-
Re: LG 37lv375s no 24V
Looking like a mainboard fault.Comment
-
Hi to all 😎
I'm looking for any useful information to repair this interface (I have attached the image).
On this board I read E3215-1215A_4D.
This is the small plate inside the HD enclosure that allows to connect a 12 volt power supply, interface the disk with a USB 3.0 socket and is connected to the HD with the SATA connector.
If any of you have found a burnt or short-circuited component in a circuit like mine, if you have useful diagrams for the repair, or even better a description for the tests at the test points, I would be very grateful.
in particular...11-12-2024, 08:08 PM -
Hi i have an issue with LG 42lw4500 wich after pressing the power button flashes red then goes solid white light 2 clicks and nothing , the weird thing is SOMETIMES if i leave the tv plugged in it would come on and fuction normally (i should mention that vertical rectangle going from the bottom to the top of the screen have some red dot artafacts it only appear in somthing like the tv input menu and any input i give like vga , but not in the system menu , i thought i should mention this , i cannot confirme if the tv had this issue when it was up and running in its previous owner . ) when checking... -
So I bought this LG 65UQ70 today at Walliworld. Put the wall mount on, set it up, worked for 30 mins and then I get these jumping horizontal bars. Let the TV do updates and let it cool down for 5 mins. Worked perfect for 2 mins. As soon the TV is warm I get the jumping vertical bars again.
Keep the other TCL thread in mind. Now I am questioning are all COVID 2022 / 23 TV’s bad or what? That’s two 65” TV’s one from Amazon and this one from Walmart. What are the chances on that?
I guess this one goes back either later today or tomorrow morning, unless... -
I have been wanting to do this project for some time using a Mean-well switching power supply that I bought at least ten of them that were originally in a device that was abandoned for some reason they were listed new but removed from equipment that was never used
I do not understand Mean-well the capacitor next to the voltage reference ic chip was a brand that is known for failure over time the other capacitors are brand name needless to say it got replaced before I even powered it on for the first time
I used a four USB outlet and electrical plate that is made for... -
Here is the page of capacitors that I can choose from what is a good choice for a FSP 400-60GLC
https://www.digikey.com/en/products/...Xmc1YPJ6BlESoA
I try to use a 565-1664-ND which is a 10mm in diameter unfortunately it will not fit because there are two of them the same size and value and there is no room and they go to two different circuits not in parallel...
Comment