LG 39ln575s - power ON, backlight ON but no screen.
I checked TCon board V390HJ1-CE1 and VCL -8V, VCH 30.2V.
Display is HC390DUN. With both strip is backlight only - nothing on the screen.
If I put 1st strip off, I see 50% black 50% white. If I put 2nd strip off, see some lines vertical/horizontal with pink color (probably color of LG logo) and after that, white on thle left corner.
The IC chip CM501 (probably booster for VCL and VCH is hot - after 1 minute is not possible to put finger for more than half second.. So I think it has got about 70C. Is it normal?...
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Today, 11:15 AM
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I have an air con appliance that doesn't always start when power is applied. I have removed the small control board which is separate from and supplied by a 24v power supply (that works fine) and inspected it for any obvious failed components but can see none. I have discovered that the board will start if I wave a hair dryer over it for a few seconds. The board appears to have no temperature sensors or sensitive components on it. Can anyone suggest what the most likely candidate for a failure mode of this form.
Many thanks.
John...Today, 01:49 AM -
Hello !
I am repairing an iMAc A1311 main board 820--3126A and power supply board 614--0445.
Does this power supply have a 0 Ohm resistor (R106) with one side connected to ground and the other to pin 5 of the 12V S0 connector? I don't understand and I don't have an electrical diagram for this source.
Can someone help me ?
Thank youToday, 11:25 AM -
Hello,
I'm working on a MacBook Air A2337 that had liquid damage on the right I/O board. I ultrasonic cleaned the board and it all functions except the computer has no audio. I tried reballing the audio IC which is [B]TAS5770AC0[/B], but that did not restore audio. I could just replace the entire board, but I wanted to see if replacing the audio IC would fix it first. Mouser has a similar audio IC in stock which is [B]TAS5770LC0YFFR, [/B]but I wasn't sure if it is compatible. I was just wondering if anyone knew if I could use the one from mouser as an acceptable replacement or if...Today, 11:13 AM -
[SIZE=14px][FONT=Arial]Hi All - I am hoping someone can help with some pointers (complete noob here!)
I have recently purchased a Scotle HR460 BGA reball machine (it's a bit old and I think the company no longer exists either), but as far as I can tell it is a competent and unmolested machine that should be good enough for my needs.
My biggest problem is that it came with no profiles, and I must re-create all of them from scratch, something that is very scary for someone that doesn't really know what they are doing.
The simple stuff like a small memory module isn't a big...Today, 11:07 AM -
I have just realized that my meter is off, when I measure the car's battery, and I can't imagine how that happened.
I also have a 87, and when I doubled checked the voltage, the 87 was showing 3.5V higher, than the 189. Most likely the 189 is off.
Where should I start with the 189?
Switched leads between the two meters, but nothing has changed.
I have not opened it yet.
Any help would be appreciated....11-27-2023, 10:50 PM -
-
Hello ,
Need Schema or boardview Lenovo L15 gen 3
thanks
Ref LG4 LT5 ADL RT UMA MB
[ATTACH=JSON]{"data-align":"none","data-attachmentid":"3160768","data-size":"medium"}[/ATTACH]
Button power not workHello ,
Need Schema or boardview Lenovo L15 gen 3
thanks
Ref LG4 LT5 ADL RT UMA MB
[ATTACH=JSON]{"data-align":"none","data-attachmentid":"3160768","data-size":"medium"}[/ATTACH]
Button power not work...Today, 04:54 AM -
Hi
[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos
Photos tell it all really. ( added Logo image photo )
The bulge in the area before the panel Matrix .
To me it looks like a local short that heated inside.
Should I waste my time in flipping the panel , as if this issue can be repaired ?
The distribution board at this end looks ok , though I did not measure anything
What are your thoughts ?
CheersHi
[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos
Photos tell itYesterday, 11:30 AM -
Hi,
I am new here, so first off all I would like to thank you all for advice that you share.
i did saw few similar problem as mine on this forum, so lets see if I will be able to bring my TV back to life.
When I power TV, I could here relay click and red light blinks for 7 times and then it stops lit, looks like TV is ON, but nothing on a screen, no video, no backlight and no red light on Optical connector on MB (when T-Con board is disconnected, red light blink for 3 times and then is ON, same as TV is off and relay clicks).
On power supply...11-29-2023, 07:27 PM
-
-
Hi everyone i have laptop Lenovo Legion 5 15IMH6 need bios . .
model board is HY56F / HY56H NM-D821
SN:PF33HWLL
THIS IS BACKUP BIOSToday, 05:11 AM -
I have an air con appliance that doesn't always start when power is applied. I have removed the small control board which is separate from and supplied by a 24v power supply (that works fine) and inspected it for any obvious failed components but can see none. I have discovered that the board will start if I wave a hair dryer over it for a few seconds. The board appears to have no temperature sensors or sensitive components on it. Can anyone suggest what the most likely candidate for a failure mode of this form.
Many thanks.
John...Today, 01:49 AM -
Hi people.
I have been trying to get my head round these issues with the eMMC putting the TV in to a boot loop condition, or completely dead, when a dump of the Boot 1, Boot 2 and USERDATA partitions have been made, the MLC lifetime counter has been reset, using the original eMMC with the RPMB partition intact and the eMMC is flashed with the original dump, Netflix and a few other Apps don't work. i assume all the DHCP keys and factory programmed RPMB access Key will be contained within the original dump, and as we are re-flashing the original eMMC i would expect every thing to work....Yesterday, 10:43 AM -
Hi
[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos
Photos tell it all really. ( added Logo image photo )
The bulge in the area before the panel Matrix .
To me it looks like a local short that heated inside.
Should I waste my time in flipping the panel , as if this issue can be repaired ?
The distribution board at this end looks ok , though I did not measure anything
What are your thoughts ?
CheersHi
[U]Pilot PD43S9HE Led TV . Panel model[/U]: See in photos
Photos tell itYesterday, 11:30 AM -
[SIZE=14px][FONT=Arial]Hi All - I am hoping someone can help with some pointers (complete noob here!)
I have recently purchased a Scotle HR460 BGA reball machine (it's a bit old and I think the company no longer exists either), but as far as I can tell it is a competent and unmolested machine that should be good enough for my needs.
My biggest problem is that it came with no profiles, and I must re-create all of them from scratch, something that is very scary for someone that doesn't really know what they are doing.
The simple stuff like a small memory module isn't a big...Today, 11:07 AM -
When the power is turned on, a snapshot appears on the screen and it turns off. 2 red LEDs are flashing.
I disconnected the power module cable going to the main board. I threw a power on jumper with 3.3 v from outside. The relay is working and there is 12v and other voltages in the power socket.
Where else should I look? All fuses appear to be intact.Yesterday, 02:26 AM -
Hello ,
Need Schema or boardview Lenovo L15 gen 3
thanks
Ref LG4 LT5 ADL RT UMA MB
[ATTACH=JSON]{"data-align":"none","data-attachmentid":"3160768","data-size":"medium"}[/ATTACH]
Button power not workHello ,
Need Schema or boardview Lenovo L15 gen 3
thanks
Ref LG4 LT5 ADL RT UMA MB
[ATTACH=JSON]{"data-align":"none","data-attachmentid":"3160768","data-size":"medium"}[/ATTACH]
Button power not work...Today, 04:54 AM -
I have Dell latitude 7320 bios locked with 8fc8 password. Please help me to unlock. Thanks very muchToday, 01:31 AM
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hello everyone i need original bios and EC of this laptop
[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]
SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptop
[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]
SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptop
[COLOR=#2980b9][B]L14 Gen 2 Type 20X2-s2c100[/B][/COLOR]
SN [COLOR=#e74c3c][B]PF3G8DFB[/B][/COLOR]hello everyone i need original bios and EC of this laptopYesterday, 05:47 AM