hello guys
i have a problem with lenovo X1 carbon gen 2 laptop, with motherboard code "LMQ-1MB 12298-2 48.4LY07.021"
The main problem is that when I plug in charger, the power LED indicator flashes 4 times, the fan spins for a moment then turns off again and keeps repeating, I've tried flashing the BIOS but the result is still the same
I hope someone can help me ​

Hi all!

I've got an Asus FX517ZC on the bench at the moment and I just can't figure out what's going on with it.


[B]Here are its various numbers and identifiers:[/B]
Model short: FX517Z
Model long: FX517ZC-HN114W
SN: NANRCX01S57842E
CN: 3SDB 12M
MFD: 2022-10
Motherboard model: DA0NJLMBAE0 REV E


[B]Symptoms:[/B]
The laptop's charge light comes on, but when the power on button is pressed nothing happens. No fan spin, no caps lock, no screen or keyboard backlight, nothing.


[B]History...

Hello,

I'm looking for pointers/ideas:
- [B]Lenovo Thinkpad P50[/B].
- motherboard: [B]BP500, NM-A451, VER 1.0[/B]
[B]- schematics & Boardview:[/B] [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/76075-thinkpad-p50-nm-a451-schematic#post3242496[/url]

- [B]CPU: SR2FU (i7-6820HQ)[/B]
- [B]GPU: N16P-Q1-A2 (Quadro M1000M)[/B]
- [B]MEC1653-BA1[/B]

When I switch on power supply motherboard take maximum[B] 0.070A[/B]...

helo evreyone
i have motherbord GA-EP41T-UD3L
the proccesor fan spin slowly and the (RST) LED in post card is flashing.
i check the MOSFET and VCORE and its ok..
i replaced many proccesors and nothing haapend.
i tried to charge the bios many times and its the same result.
the ram1.8v is ok.
the south and north bridges voltage is normal.
can anyone help me please?.

Hi!

I have this mini pc that doesn't want to start.
When I plug in the charger it goes into protection mode.

I check the input pins in resistance mode and they are not shorted.
But in diode mode its 0.174V

When I opened it up I saw something new, no input mosfet, just big diodes next to the charging port. I checked on the coils for shorts but didn't find anything suspicious. Only the CPU coils have low resistance but that should be normal because it's an 11th gen I7.

I injected some voltage to find the short but the board was only...

I've had this laptop for 8-9 years, and about a week back, it started malfunctioning. When I press the power button, the power LED comes on for about 5secs and turns off. The fan also doesn't spin at all during this time. But, if I press the power button, and then manually spin the fan, the laptop boots up and the fan starts spinning on its own. Even if I do this, and the laptop boots up, it turns off (hard shutdown) after some time between 10secs and 1hour randomly. I've tried checking the fan voltage and it's at zero volts when I press the power button without spinning it, but when I spin the...

Details contained in these two reddit posts: [url]https://www.reddit.com/r/ElectronicsRepair/comments/1bzpuey/asus_tuf_h370pro_gaming_motherboard_repair/[/url] and [url]https://www.reddit.com/r/ElectronicsRepair/comments/1c1a3nl/need_help_finding_a_datasheet_for_super_io_chip[/url]

I've been attempting a repair of an Asus TUF H370 Gaming Motherboard. It fails to react to the power button being pressed, there's a debug light which confirms that there's standby power to the board but after any attempt to power on the components there's no sign of life. I've started my diagnosis and...