Need to identify PU4551 power supply IC
Board: Wistron LG4 LT5 RPL RT UMA MB 8L 223042-1
Model: Lenovo L15
Thanks for help
Board: Wistron LG4 LT5 RPL RT UMA MB 8L 223042-1
Model: Lenovo L15
Thanks for help
Attached Files
-
Dear all,
Laptop is Lenovo Thinkpad L480 (boardview can be found in this badcaps topic). When pressing the power button the LED power light turns on, but nothing else happens.
I removed the motherboard, checked for shorts on the main inductors. I found that there is a short to ground on the +3VALW_P rail (@PL201). I soldered a wire on the PL201 inductor, and I injected up to 1.3V with my power supply. Current drawn is approximately 3.2A.
I used a small thermal camera to locate the shorted component. But nothing on the board heats significantly, except the... -
Model: Lenovo Slim 7 14IAP7
Motherboard: NM-E412
Please, take a look at the enclosed photo and help me identify this IC. It is currently shorted, no boardview or schematics, I am unable to make out what this is.
The chip has markings "Y182" on line 1 and "2898" on line 2.
Thank you.... -
Hello
Works perfectly except the power button.
You have to start it with Cmos removal.
No réaction from the button.
The lights are présent.
3V and Gnd are présent on button
I made a request for the diagram here but it is not available.
MB Wistron 223030-1
Ref LG4 LT5 ADL RT UMA MB
https://www.badcaps.net/forum/troubl...-adl-rt-uma-mb
after... -
Lenovo V110-15AST Wistron LV114/LV115-ASR-15283-2 Schematic...10-03-2024, 06:45 AM
-
LENOVO ThinkPad X1 Extreme Wistron LPM-1 MB - 17870-1 Schematic & Board View...
Comment