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Re: Cpu_core signal missing. Lenovo g50. Help?
that is a good idea. Before reprogramming, make sure all the power rails connected to PCH are present. Those power rails are the ones mentioned in page3-13 of the schematics except CPU_Core and VGA rails. If one of the rails is missing, the PCH will not work.Comment
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Re: Cpu_core signal missing. Lenovo g50. Help?
I done reprogramming and nothing new..
I will check the rails as soon as I get back.Comment
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Re: Cpu_core signal missing. Lenovo g50. Help?
Where did you get the bios and ec dumps,can you post them here .Comment
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Re: Cpu_core signal missing. Lenovo g50. Help?
Hi, I also have similar issue. Do you get any solution for this.Comment
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Dear all.
I have a Lenovo Legion 5 that come to me as faulty.
The problem was that Adapter_ID pin was shorted by some liquid... killing the EC (there was a hole in the EC) (therefore 3.3v was shorted)
I have removed shorted EC it and tested that if i short EC_SBM_CK1 to ground, then the BQ24780SRUYR power IC lets 20v pass the first and second mosfet.
Nothing else seems shorted when checking 3V,5V, 1.1V, battery or 1.0v coils, so I have ordered the new EC chip.
I have ordered a preprogrammed Chip for NM-C921 and soldered it on. (No pins shorted after checking... -
For Badcaps Readers, Please note that I am hopefully going to present this same message to Lenovo to see if they have any insight to the matter as well and figured to share the entirety here for clarification. The System is out of warranty as it is but does have the option to have it extended.
Model Information: T14 Gen 2 (Type 20XK, 20XL) Laptop (ThinkPad) - Type 20XK - Model 20XK0069US
Board: T14 Gen 2 (Type 20XK, 20XL) - Type 20XK.
System Hardware:
Processor: AMD Ryzen 7 PRO 5850U
Memory: 1x 16GB DDR4 3200 (Soldered on Board); 1x Crucial 32GB DDR4...09-08-2025, 10:46 PM -
Hey guys.
Need help with this one.
Fan not spinning due to missing PWN Fan signal.
Also 5 seconds from powering up it freezes, unless in BIOS.
But as soon as Windows starts to load, it will freeze.
CPU is COLD / Room temp when it freezes.
I've replaced the CPU, same problem.
Replaced SIO/KBC IT8987e and reprogrammed - same problem.
Replaced fan - same problem.
Replaced flex cable from board to daughterboard (which has fan connector on it) - same problem.
Checked the Thermal sensors around CPU and Board to the SIO/KBC and...08-19-2024, 05:22 PM -
Hi all,
I got a Lenovo Thinkbook 16P G2 ACH on the bench with a botched BIOS (somehow my client blanked it). I restored the laptop and got it up and running with original BIOS from Lenovo Support website.
My problem is now that the machine details are missing in the BIOS (Serial Number, MTM, etc.)
I tried to write the details with the Lenovo Uone Tool but had now luck. It is giving me an error: "ERROR: Locate protocol with LenovoEeprom, Status=[e]. EEPROM fail when reading or writing data."
I am now asking here for help if anyone knows how to do this in... -
I have MSI mpg b560m bazooka motherboard . this motherboard RSMRST# signal missing . i already reprogram bios but same condition
My Motherboard this power stages are ok ...but 3vsb voltage have 4.17v (image added)
VCCRTC ok
RTCRST# ok
ATX_5VSB ok
SIO_3VA ok
3VDSW ok
DPWROK ok
SLP_SUS# ok
VSB_ENABLE# ok
5VDUAL ok
3VSB showing 4.17V
PCH_1P8_VSB ok
PCH_VCCIN_AUX ok
RSMRST# No voltage
this all voltages are ok but RSMRST# voltage is missing i did try to re program bios and change io but same...
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