Hi everyone!
Hope you're all having a great day, and thank you very much for stopping by and taking the time to read this post to help me with my parents' Samsung TV.
My issue: No backlight.
Model: QE82Q70RAT
Type No: QE82Q70RAT
The TV was already serviced by Samsung once under warranty for the exact same issue, but six months after the fix, the backlight went out again. Now, Samsung is asking for nearly the same price as a brand new TV to fix this with the same 6-month guarantee.
So hopefully, I can fix this cheaper.
...
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-
05-22-2024, 06:56 AM
-
Hello ! The system installs but cannot boot and the screen of death appears.
macbook works in safe mode
after pressing the power button, the system starts to boot after 27 seconds, which is a very long time
05-18-2024, 06:32 PM -
On this board I have no backlight, but I can see that an image is present when I put a strong light behind the lid.
On LCD connector:
PPVOUT_S0_LCDBKLT =0V - resistance to ground on this pin: 163ko
LCD_HPD_CONN =2.5V
PP5VR3V3_SW_LCD =5V
EDP_PANEL_PWR_OR_PSR_EN =3.3V
EDP_PANEL_PWR =3.3V
LCD_PSR_EN =0V
EDP_BKLT_EN =3.3V
EDP_BKLT_PSR_EN =3.3V
LCDBKLT_EN_L =12.5V
On U7700:
VDDD =5V
VDDA =5V
EN =3.3V
SD =12.4V
VSENSE_N =12.6V
VSENSE_P =12.6V
Any suggestion on...05-22-2024, 06:42 AM -
hi
I did bios update for this laptop, but something went wrong and I lost the serial, model even mac adress:
Model: 15-da0103ng, serial: CND8488CXW, ProdID= 4ET85EA#ABD.
I tried to use hp bios configuration tool, but always i get access denied and cannot set config file
I read my bios:...Today, 06:32 AM -
Hi
All
Does anyone have a board view for
LA-1701 REV 2.0 HP Compaq nx700, schematic and board view
Thanks so muchToday, 06:24 AM -
Hello my vacuum cleaner dock died, 0V on output. I replace the caps but still no voltage. I found out that this resistor is broken (showing 0 Ohm) do know the value of this? Is this really 0 Ohm resistor?...Yesterday, 10:07 AM
-
Hello to all, I'm new here on this forum, so I have T-con board that makes me crazy, so when I start to diagnose the problem, on first MAX9591 was overheating so I tried with 1 flat cable from panel and half picture was working and IC was fine, so I take out T-Con I check every capacitor, diode, mosfet, everything was good, so I continue to right board from the panel, I check everything, and I didn't find any issues, so I connected again, I started the Tv with both flats, and TV worked, I tried every settings in menu and was working fine for more than 30min, so I turned off , I take Out again...Today, 12:55 AM
-
zz0.8tpitu4y0i8zzI bought a ch341a (I'm waiting for it to arrive) and I noticed that the programmer has a bug that the data pins go to 5v when the VCC pin is at 3.3v (which is the voltage I'm looking for).
Instead of doing the 3.3v mod, I'm thinking of converting the 5v to 3.3v with an 8 channel TXS0108E through the ZIF socket but I don't know if that would work, because it has to circulate voltage and also information.
What I am looking for is something that will convert from 5v to 3.3v but without modifying the ch341a.
I can't buy the ch341a 1.6v that has...Yesterday, 06:51 PM -
I bought a T12-958 recently with an M8 handle and until now it has worked very well. The tip wasn't earthed but that was easily resolved.
Now, whenever it is switched on, it heats up to about 70*C then shows an [INVER] error on the screen and stops. In order to fix it I have to either unplug and re-plug the handle, or unplug and re-insert the tip from the handle. While doing that it changes to [ERROR], then it finishes heating up and works perfectly. Until it's turned off, after which it will show [INVER] again next time it is turned on.
Any idea what the problem is?05-06-2024, 01:36 PM -
Hello, I have a question about electricity. Suppose I'm well insulated from ground and neutral, and the live wire of mains comes in touch with a wound in my finger, will this potential interfere with body voltages, hearth for example, or it will only go to its circuit return path ?
Thanks!05-23-2024, 02:12 PM
-
I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection...Today, 03:27 AM -
Hello my vacuum cleaner dock died, 0V on output. I replace the caps but still no voltage. I found out that this resistor is broken (showing 0 Ohm) do know the value of this? Is this really 0 Ohm resistor?...Yesterday, 10:07 AM
-
hi
I did bios update for this laptop, but something went wrong and I lost the serial, model even mac adress:
Model: 15-da0103ng, serial: CND8488CXW, ProdID= 4ET85EA#ABD.
I tried to use hp bios configuration tool, but always i get access denied and cannot set config file
I read my bios:...Today, 06:32 AM -
Hi
All
Does anyone have a board view for
LA-1701 REV 2.0 HP Compaq nx700, schematic and board view
Thanks so muchToday, 06:24 AM -
Hi everyone!
Hope you're all having a great day, and thank you very much for stopping by and taking the time to read this post to help me with my parents' Samsung TV.
My issue: No backlight.
Model: QE82Q70RAT
Type No: QE82Q70RAT
The TV was already serviced by Samsung once under warranty for the exact same issue, but six months after the fix, the backlight went out again. Now, Samsung is asking for nearly the same price as a brand new TV to fix this with the same 6-month guarantee.
So hopefully, I can fix this cheaper.
...05-22-2024, 06:56 AM -
Hello to all, I'm new here on this forum, so I have T-con board that makes me crazy, so when I start to diagnose the problem, on first MAX9591 was overheating so I tried with 1 flat cable from panel and half picture was working and IC was fine, so I take out T-Con I check every capacitor, diode, mosfet, everything was good, so I continue to right board from the panel, I check everything, and I didn't find any issues, so I connected again, I started the Tv with both flats, and TV worked, I tried every settings in menu and was working fine for more than 30min, so I turned off , I take Out again...Today, 12:55 AM
-
Hi can anybody help me with a Bios password removal on a ASUS UX425EA-KI560T /N:M6N0LP02P89724B NB2555_PCB_MB_V4
I have searched under Bios guides and Methods, extracted the bios and used a Hex reader to search for the correct string but i simply cant get my head around it.
Original Bios dump attached...Yesterday, 01:54 AM -
Hello everyone.
Here is the bypass solution for several Lenovo ECs.
This has worked on many ECs.
Only works if password is contained in EC
I succeeded on many models
[URL="https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/104872-lenovo-l15-gen-2-ryzen-password-removal-w-vertyanov-successor?p=3217086#post3217086"]https://www.badcaps.net/forum/troubl...86#post3217086[/URL]
[URL="https://www.youtube.com/channel/UCeF58jC2Bt_adKcguvynjeA"]https://www.youtube.com/channel/UCeF...t_adKcguvynjeA[/URL]...03-17-2024, 11:57 AM -
Hello all,
I'm working on an Acer Nitro 5 (AN515-54) with motherboard EH5VF LA-501P with a short on the power rail.
I'm just learning board level diagnostic, but here is what I've found so far.
I injected 1.5v to one of the positive leads on the DC jack connector (PJP101) and read about 1.4a to ground.
I felt around for heat and found the MOSFET at PQB12 is rippin hot!
when i pulled the MOSFET from the board the short went away. In my mind it was a faulty MOSFET.
Ordered a replacement and got it installed only to find it gets very hot again and the short returns....05-23-2024, 06:07 PM -
Hi Folks
I've got a friend's LG OLED on the bench (well the dining table given the size of it!). It immediately powers off when turned on and sits in standby. PSU voltages are good and after disconnecting the TCON board there is stable 12V and 22V coming out of the PSU board.
Hunting around the TCON board there appears to be a shorted power rail (DVDD09_CORE) but I'm having issues identifying the component which is shorted. I've attached a picture. It's sitting before the coil so I'm assuming it's a MOSFET of some description, but the markings I can make out don't seem...Yesterday, 06:27 AM