ASUS K570U (X570UD) low resistance after EC change

[someonenotyou]

Hi.

I have a ASUS K570U (board model X570UD) which had a bad EC (IT8995E-128 DXS). I ordered 2 new EC chips on AliExpress.

After I changed first chip and powered it on, nothing happened, and I found out that there was a short on +3VA_EC. I desoldered the EC and checked +3VA_EC on board, it had kOhms (cant remember exact number). Then I checked the GND and +3VA_EC on the EC chip itself and they were shorted.

Now, I soldered on the second chip and made measurements on all the pins (I have not powered the board with the new chip yet). And I found these pins...

[Zickko10]

Model : Lenovo Thinkpad x13s Gen 1 Board no : 213036 -1. 448 . 0QLO3. O011 LWOS MB
S/N : PW-03LAKV
The laptop powers on to post and shutdown immediately
here is the old bin...

[tomy78]

Does anyone have a schematic or boardview of the Asus UX5401EA R2.2?...

[ktmmotocross]

I have this Lenovo Ideapad 3 5G ARM Snapgragon 14Q8X05. that dont see hardware when installing W11. it literally says " install driver to see hardware.
disc turns bad on him so i dont have recovery

i cannot find anything about this fault. on support of lenovo same nothing. How to deal with this new lenovo crap?

[eltano4i20]

1) Error trying to enter the BIOS
--> [F2] won't let me enter the BIOS. To enter the BIOS, I had to create a shortcut and then type C:\Windows\System32\shutdown.exe /r /fw /t 1 in the destination. This forced it to restart and enter the BIOS.
Once inside, I went to the BOOT menu, but, surprise, it wasn't there. I got the following message:

BOOT PRIORITY ORDER (img-05)
1- Windows Boot Manager
2- SATA HDD
3- NETWORK
4- Debian

2) Error trying to access the BOOT MENU
--> I restarted the notebook and pressed [F10] but the BOOT...

[Julian Bailey]

Hi

I have a Dell Latitude 5350 Ultra 7 Motherboard I am trying to repair that has a blown chip.

The chip is marked as eHOLH similar to the one I have pictured.

Any ideas what it does and what the pin outs are as 3 tracks have gone and need to find out what / where they went / did etc.

Dell PN of the motherboard is 08DCGW.




Below is the area I am trying to repair:



Does anyone have a picture of this motherboard in this area they could take and upload?

Cheers...

[mitchw]

Board had some light liquid damage, nothing serious, just one bad looking cap that I removed (from PPBUS_G3H to ground), near speaker amps.
There was no corrosion as such, just few tiny spots, really minor.

The board is stuck at 5V, it draws 0.1A all the time. Only at poweron the amperage surges up to about 0.15-0.18A, then it settles at 0.1A.
I put it in DFU and it didn't do anything, wasn't detected on other machine.

Voltages all seem OK near the CD3217 chips, all LDOs are present, also no liquid damage was nowhere around those.
But measuring other...

[howardc64]

2+ year old TV with many (720? 65" version has 720) mini LED dimming zones. TV boots, has sound, panel picture can be seen with flashlight. No backlight. No TV model sticker on rear panel (Maybe Samsung service removed it, read below). Found the model # through the PSU and zoned LED driver board numbers.

PSU has a click near LED output circuit at 1 second interval, sounded like the 4x barrier rectifier area. Protective pastic liner under PSU shows heat signature on the Schottky Barrier Rectifier in this circuit. Found a shorted diode (2 diode per rectifier, failed rectifier labled...

[davidebeatrici]

Before proceeding with a component level repair, the usual troubleshooting process was followed:

1. Disassemble and unplug everything except the power connector.
2. Replace RAM.
3. Replace CPU.
4. Rewrite BIOS.

Unfortunately the board was still stuck with a 0.75A power consumption at 19V.

After reflowing both GPU and north bridge in one shot (it can't hurt) there was an instant improvement with a constant 1.75A power consumption, but I immediately noticed smoke and the typical smell coming from the GPU area.
I thought to myself "Well,...