PU1 and PU2 replaced, but nothing changed.
on power switch i get 3,3V, and it GND when pushed.
On other board from Lenovo A485 i have 9,2V, but all other voltages are on the board. Maybe charger is faulty, as it is thinking it is on battery, cause voltage is on PR151, but on AC adapter it shouldn't?
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It will take long time to delivery to me, as only aliexpress have reasonable price. Even donor motherboard could be cheaper.
Mayby i will desolder them could connect by wire IN and OUT for test purpose?
Edit- i will check if it give powergood signalLast edited by rbvndonh; 05-22-2024, 08:17 AM.
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Unfortunatelly with batteries, tamper switch pushed, power adapter it even don't give led light on board. There is 0,00-0,01A consumption only.
PQ103
1-5 2,49MR
1-4 600KR waiting 2 minutes and it is still rising over 1,2MR. Strange
4-5 11,5MR and slowly rising
PQ108
1-5 2,5MR and slowly rising
rising
1-4 510KR
4-5 3MR
I flashed with outimage with clean ME from working board, but no change in operation.
Working board switch on with only power adapter.
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Thanks for fast reply
working board":
PQ108 1-3 pins Power supply only 10,2V
Battery only 11,98V (differ after reconnecting in range of 0,5V)
Borh 12,93V
Vregin20 on PD13 pin1
Power supply only 9,7V
Battery only 12,44V
Both 12,4V
I2C_CLK_CHARGE 3,3V
I2C_DATA_CHARGE 3,3V
Damaged board:
Power adapter only
PQ108 1-3 pins 9,23V
I think U101A ans U101B is same chip, just they divide it on schematic due to lack of space. As U101 is BGA, i only could...
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Hi. I have very similar problem with 9.2V on VSYS.
PF7,8,9 and D12-D14 are OK.
I2C_CLK_CHARGE i have 0V
VREGIN20 i have 8,6V
On good board i have:
PQ103:
1-3 10,2V
4 10,2V
5 20mV (almost 0V)
PQ108
1-3 10,2V
4 2,27V
5 10,2V
PR151 0V
Bad board:
PR151 9,26V
PQ103
1-3 9,26V
4 3,3V
5 9,26V
PQ108
1-3 9,26V
4 8V and slowly falling down
5 1,6V and falling down
Faulty PU101?
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Maxpower, hat put of my head. I saved hundred bucks to buy SVOD for L15 laptop.
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I correct solder joints and measured resistance to ground. It was same as other board with working 20V.
i dumped from OK board U15 chip and just reflash it to old board. Verification was OK, but board was still not working.
I tried to read dump to compare and it give errors during verify.
After soldering new W25Q80BV all went well and i have 20V 😀
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Any proven solution for Lwnovo L14/L15 and NPCE68BPA0DX, maybe bios file if short pins not work?
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In old Lenovo it was required to qround security chip just before pressing F1 or even during pressing F1, to brick communicTion, so bios don't read password from it.
Maybe try that way.
I also wonder if it is not necessary to ground all 126 127,128 and 1 pin at the same time to ground.
Also some hint here for older Lenovo:
[url]https://davidzou.com/articles/bios-password-bypass[/url]https://In old Lenovo it was require...t.<br /> Maybe...Last edited by rbvndonh; 05-07-2024, 02:46 PM.
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I tried to comminicate, but RY809h don't have this chip in list of available chips. Auto dont work, so maybe resistor switch is required.
I think buying RT809H instead of SVOD was one of my biggest fault lat years.
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Sorry, but this is bioa with my service tag or elswhere available bios? Thanks
how to find my service tag?
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Re: THINKPAD L390 password
go to bios and put "load factory defaults" or simila option on last window of bios and then click "save and exit".
If not work, make your own supervisor password. Go to bios, make reset and the delete your password.
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Re: Dell latitude e7240
Hello,
Kindly please help in repair BIOS 64bit. 32bit file is checked and proper one.
I already tried clean ME but not worked. It just turn on withour 3 restarts.
On other bios with clean ME it starts, so the only issue is BIOS.
Dell Lattitude E7240
Board Code: VAZ50 LA-9431P REV 1.0 (A00)
sticker with service tag is damaged, it is not visible.
on other bios i check there is i5-4300U.
recovery of ST will be an aditional advantage.
seems no CD-KEY for Windows.
Thank...
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Re: THINKPAD L390 password
Test and reply. Plese think even about small donate for forum...
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Re: THINKPAD L390 password
try this. For me this metod worked out....
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Re: Lenovo Thinkpad L15 (CPU 10th Gen) Supervisor Password
Vesko,
Author of this topic ask about password and how to recover it. Seems he made a post in wrong part of forum, as he didn't made bios request, but password removal help.
I continue discussion of how to remove password.
I didn't upload bios file at all, so i think this is missunderstanding.
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Re: Lenovo Thinkpad L15 (CPU 10th Gen) Supervisor Password
Please help with connection of RT809H.
With auto-ISP it shall connect without problem?
RST cable shall be connected?
There is somwere 10K resistor to switch to able programming?
I made schematic fot ISP/JTAG, can someone confirm?
reupload with small image...
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