Thank you for the info.
I try to join these lines, Fingers crossed....
questore
Badcaps Veteran
Last Activity: Today, 02:15 PM
Joined: 12-15-2015
Location: Pest
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davidebeatrici
Can you read your CPU_PLT_RST voltage on the working config?
I'm suspecting a cracked CPU solder joint but I dont want to reflow CPU if I can jumpstart by taking 3.3v from CPU_PLT_RST1_N signal....Leave a comment:
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CPU_PWROK - OK
FBVDDQ_PWROK - OK
EC_SYS_PWROK -OK
ALW_PWRGD - OK
VR_PWRGD - OK
NVDD_PWRGD - OK
VGA_PWRGD - OK
CPU 1,1V
GPU 0,75V
VRAM: 1,21V
RAM: 1,23V
All other coils have normal voltage as well
Something is strange.
CPU_PLT_RST1_N = 3,3V but CPU_PLT_RST_N is 0V how can this be?...Last edited by questore; 10-25-2025, 02:05 PM.Leave a comment:
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- 3V_RTC present
EC_RTC_RST_R_N 0v because there is not RE874 on the board. is it not optional?...Leave a comment:
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I have checked some rails and RTCRST is never gets high but RSMRST is high as it shouldLast edited by questore; 10-24-2025, 06:07 AM.Leave a comment:
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Does SPI CLK# voltage present when the board is out of the case?
I know i had SPI CLK# voltage 2 times but not eversince.
I'm begining to suspect that since LID_SW is comes from the LCD connector, this board cannot turn on without the LCD even connected.
Also TP connector has the same LID_SW_N output so maybe it can also effect the process. Maybe i had SPI_CLK only when the board was in the case holly-molly....Last edited by questore; 10-23-2025, 02:13 PM.Leave a comment:
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New Bios chip arrived and it can be read and write while onboard. I was right.
2 BIOS tryed but none worked. Same symptom.
Next step is to clean the EC and let the board reprogram itLeave a comment:
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Hp 430 G6 EC reprogramming configuration
Hi Guys,
I have this board that is not reacting to power button and not charging the battery. Every standby rail is up and running (3.3v 5v, 1.8V), lid sw and all the rest ok but "RSMRST" is never gets high and no short on the board. I suspect the EC but I cannot get to it with my programmer.
Can anybody take a look at my made up config:
da0x8imb8e0 KB_pins=42 LEFT DOWN 05MM FLASH=256 JENK=17 TCK=2 TMS=20 TDI=3 TDO=14 CHIP=NPCX797HA0BX
Maybe i have missed something.... -
MORE diagnostics:
- Mesured RTCBATT line is taking 15 milliamps (seems fine)
- When a new CMOS battery is plagged after connecting (3.3V battery) it instantly reads only 2.9V
- (when no main battery plugged but CMOS battery is plugged and AC adapter also plugged) Then starting laptop, shuting down is fine but if i remove the AC adapter and plug it back in the EC again freezees on 4 millimaps draw and no reaction to power button anymore until CMOS battery is unplugged.
- Cannot reprogramm EC because i found no way to do that.
Any ideas?Leave a comment:
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HOW TO: Tutorial for removing Lenovo x390 yoga bios password
Hi Guys,
I thought I write you a tutorial on how to remove your bios password from your lenovo x390 yoga.
Steps:
1. Get an EC programmer and read the EC firmware.
2. Back up your working EC file !!! (on this modell EC stores all hardware infos and you cannot replace it with others)
3. In your EC firmware file find all of these ranges with a hex editor and replace them with 00:
!!!!!! IMPORTANT THAT YOU ONLY MODIFIED THE SPECIFIED RANGES AND NO MORE.
(I have used HxD Hex editor FREE for this since I found that it is easy to replace ranges)
0x36000... -
Anybody knows the EC read configuration from schematic OR has an EC dump?
ThanksLeave a comment:
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I have tryed your EC :
POST ERROR and laptop no longer boots:
0183: BAD CRC of Security Settings in EFI veriable
0177: bad SVP data, sto POST task...Leave a comment:
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I'm beginning to suspect the BIOS IC itself.
What is your IC part number?
I have read an article about a DELL xps that was acting exactly like mine for a partial second there is a voltage on SPI_CLK then CPU grounds it because its not answering fast enough. I order a new chip and see what happens.
BTW about your project:
1. Do you have activity on BIOS Pin 8# when you power it on?
2. When you have replaced you GPU with a different one, have you checked the GPU bios is good for it?...Last edited by questore; 10-11-2025, 08:22 AM.Leave a comment:
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Hello, I have a x390 yoga. I have flashed the patched bios but im not getting the hardware ID screen and I dont have to press space 2 times, it just goes to BIOS right away and therefore, no luck to remove password
Can anyone help me?Last edited by questore; 10-10-2025, 10:35 AM.Leave a comment:
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Multi phase controller should work fine without one mosfet.
Yes I have NVVDD 0.81 and NO I have not replaced the shorted mosfet only removed,...Leave a comment:
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Programmer arrived and works perfectly. EC firmware was very similar to what I have So I am assuming its another version but OK.
Tryed reprogramming what we have both version acts the same.
Also After reprogrammed the EC I could read the BIOS with a clip for some reason so i decided that i reprogramm the BIOS with the only version i had 1.4 volt on the BIOS pin.
Result is the same but since then I again cannot rewrite BIOS with clip (not even IC detect)
This lead me to a suspected conclusion that the problem could be that something is interferencing with BIOS communication...Leave a comment:
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After cleaning the board with isopropyl alcohol.
When applaying 3v on the RTC battery positive, it only takes 15 milliams.
Symptoms a bit different:
1. I can start the laptop from AC adapter (no main battery or CMOS battery plugged) (shows battery error led code but starts fine) - OK
2. After windows in booted i plug in the main battery and remove the AC adapter (windows still fine, and batteryviewer shows 7,9V and runs fine) - OK
HERE COMES THE STRANGE PART: Measured battery voltage directly with multimeter (7.38V) WHAT?
3. Shuting down the laptop and I starting...Leave a comment:
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I would also need this schematic. ThanksLeave a comment:
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+ What i have managed to figure out. If only AC adapter is plugged in (no main battery or cmos battery) then laptop starts with power button press bios reseted and complains abouth battery voltage low but OK.
+ When only AC adapter plugged in, the board draws 100 milliamps and after about 20 seconds it jumps up to 380 milliamps (in this state, the resistor R251 next to u22 and one spot inside UE3 (MEC5105_WFBGA169) also getting hot (both IC spot are 38 Celsius )
Its like the inverter is turned on but nothing is connected on that port so why? This happens even when the board...Last edited by questore; 10-06-2025, 07:07 AM.Leave a comment:
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thank you...Leave a comment:
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