thinkbook 14,15 g4 iap bios bin NEED

[lapfix]

Did ou try again the dump given by hoaca at post #36
I think that you try without cmos connected !
if yes , back the bios of hoaca , without charger without battery and without cmos press power button for 30 second
try and give feedback

[igragon08]

Hi Lapfix, first of all, thank you very much for your help!
I've performed both the BIOS reading and flashing without a charger connected, without the CMOS battery connected, without a battery, and
even with and without RAM installed. I've tried multiple methods, and the same thing happened every time. I press the power button.
The button lights up for a couple of seconds, then it turns off and won't boot. I've also tried the dump Hoaca provided me in post #36 again, as you mentioned. I even tried the dump you provided me again just in case.
It might have flashed incorrectly for some reason, but nothing worked. I've checked all the connections on the board, but everything is fine, and I don't think it caused a short circuit because I've always taken precautions and grounded myself with a wrist strap to avoid static discharge. Honestly, I'm a little worried and frustrated. The only thing I haven't tried is the exact 30 seconds, but I have been holding the button for several seconds, but it hasn't worked. It always does the same thing: the button lights up, then turns off after a couple of seconds, and nothing. Honestly, it's very frustrating...

[igragon08]

Well, I waited the 30 seconds and nothing, the PC is dead, I'm starting to think that I have no solution, in addition, only the As programmer 2.1. 2 program is the only one that searching for the XMC25RH256C chip lets me do a dump and flash, I tried the Hoaca dump again and it didn't work, after doing the flashing, it decided to check the flash verification and it gave me a data verification error, but the flashing was done correctly, I'm starting to think that I don't know if the original reading I did is correct since I haven't been able to do any other readings, I don't flash with other versions of programs or with As programmer or with Neo programmer since they don't have this BIOS chip XMC25RH256C in the database and I'm not sure if the verification should not give any errors, I flashed again and the flashing was done correctly but the verification gave me a reading error, I tried with another programmer CH341a that I have it and the same thing; flashing is fine, but verification gives an error when reading, so I don't know what else to do. I hope you can give me a solution...

[igragon08]

Well, I finally got it thanks to you all. I want to thank each and every one of you; Hoaca388, lapfix, danito, and especially SMDflea, who has been very patient with me. In general, thank you all for taking the time to answer my questions and helping me. The problem I was having was a flashing error. I tried several times, but it turned out it wasn't done correctly. Finally, with one of your clean images, it worked. Thanks again to all of you, and I hope to continue learning a little more with your help. A big hug, and see you soon!

[Lurky]

Hello .
Someone help get a latest version of bios(Jfcn51ww) for this model LENOVO THINKBOOK 14 G4 IAP Motherboard No: LA-L931P REV 01 . SN: MP263FAB
Issue : Laptop can not detect SSD on first boot. only after pressing control + alt + del. also power light and fan on after shutdown.
Looking for solution .

[volinakis]

Hello .
Someone help get a latest version of bios(Jfcn51ww) for this model LENOVO THINKBOOK 14 G4 IAP Motherboard No: LA-L931P REV 01 . SN: MP263FAB
Issue : Laptop can not detect SSD on first boot. only after pressing control + alt + del. also power light and fan on after shutdown.
Looking for solution .

the serial you provided is for ThinkBook 14 G2 ITL. And your bios has already a clean ME so it's not original dump of your machine.

[Lurky]

the serial you provided is for ThinkBook 14 G2 ITL. And your bios has already a clean ME so it's not original dump of your machine.

Sorry for wrong serial . proper SN : MP2FJ69Z. for the dump . bios was worked on before . no original dump. any solution?

[bsloboda]

Hello guys. Seeking for your help. My frends son dropped lenovo thinkbook 15 G4 from bed. Laptop stopped working. Turns on with no picture. Lights on, fan on, charging fine. All voltages present. Although charging coil and driver is bloody hot, going crazy hot is also area around onboard ram, strange.. Tried reflow onboard RAM. RAM has glew. Didnt help. Have none experience with these new laptops. Can I flash any bios on it or must be original from factory, because of the S/N or others? Should I disable onboard RAM? Could be damaged or I damaged it with reflowing. Dont have original flasher socket for the bios chip so I had to solder wires to connect to CH341. So I would like to do succesfull flash on the first shot, I am half blind and old, hands shaky......
BIOS: Giga device, GD25R256EYIGR
Lenovo Thinkbook 15 G4 IAP
S/N: MP2EK6MY
MTM: 21DJ009RCK
MO: MPNXB330709A
Motherboard: HLXA4 LA-L931P Rev:1A

Attaching bios dump.
Thank you in advance for HELP, thanks thanks thanks.

[peste]

Hello guys. Seeking for your help. My frends son dropped lenovo thinkbook 15 G4 from bed. Laptop stopped working. Turns on with no picture. Lights on, fan on, charging fine. All voltages present. Although charging coil and driver is bloody hot, going crazy hot is also area around onboard ram, strange.. Tried reflow onboard RAM. RAM has glew. Didnt help. Have none experience with these new laptops. Can I flash any bios on it or must be original from factory, because of the S/N or others? Should I disable onboard RAM? Could be damaged or I damaged it with reflowing. Dont have original flasher socket for the bios chip so I had to solder wires to connect to CH341. So I would like to do succesfull flash on the first shot, I am half blind and old, hands shaky......
BIOS: Giga device, GD25R256EYIGR
Lenovo Thinkbook 15 G4 IAP
S/N: MP2EK6MY
MTM: 21DJ009RCK
MO: MPNXB330709A
Motherboard: HLXA4 LA-L931P Rev:1A

Attaching bios dump.
Thank you in advance for HELP, thanks thanks thanks.

check the display, LVDS cable, connectors, display voltages... and we'll see...

[bsloboda]

check the display, LVDS cable, connectors, display voltages... and we'll see...

Thank you for reply.
Display is good, LVDS good, all connectors checked....
The board is not ON, CAPS lock is dead and ESC ligt is on....
Laptop is restarting in almost periodical manner...
I went on with disabling SPD on original bnios and end up with only 1 fan spin by the first power button push.
Second push is 3 x fan spin and off......
Thank you for suggestions...
I think...it looks like corupted bios....
Can I prosede with bios from different laptop...
I do not care about serial number.
Thanks a lot for reply.

[hoaca388]

ThinkBook 15 G4 IAP - Type 21DJ

[bsloboda]

Thanks a lot for the bios. I flashed it with no success. Also used SPD removal tool. Still not working. I had 10 ohms on RAM coil. Removed all onboard chips. Now I have 1,2 ohms on the coil. Laptop starts for few seconds. On RAM coli I have 1,2 volts. All voltages present.

[hoaca388]

Thanks a lot for the bios. I flashed it with no success. Also used SPD removal tool. Still not working. I had 10 ohms on RAM coil. Removed all onboard chips. Now I have 1,2 ohms on the coil. Laptop starts for few seconds. On RAM coli I have 1,2 volts. All voltages present.

Ckeck hardware.

[bsloboda]

I flashed bios 4 times. Disaabled onboard ram with app removal, then disabled ram with pull down resistors. Always ended up with same symptoms, laptop on but no picture, capslock dead and esc light on, charging fine turn on fine. Then i realised that checking the coil resistance would be a good idea. All coils were good except RAM coil. Although I had 1,2 volts on it but the resistance was 10 ohms. So I injected 1,2 on that coil but nothing was warming up and current that drew was 0,9 amps. Then I disoldered onboard ram but resistance on the coil was still 10 ohm. Later on the resistance dropped to 1,6 ohms. Then I removed heatsink and with injected 1,2 volts to ram coil the cpu was warming up. So the cpu is dead. Maybe from beggining or I might burn it when I was reflowing onboard RAM or when i remove the ram chips. Nevertheless, the owner a month ago. hit the laptop with his fist so hard that I had to replace the keyborad along with palmrest that was cracked and disconnect the fingerprint sensor that was shorted, 6 months ago he damaged somehow the charger and last accident was that he dropped the laptop from a bed. Then he brought the laptop to a computer shop and were doing something on the board stating that the "IC PM- IC" is damaged. That was a bullshit, because I checked all the voltages and they were present. So maybe the serious fault was already there or beacause the guy hurried me to fix the laptop for the 3rd time and I screw up. So for me atleast good experience to check voltages BUT also resistance on the coils. I spent 5 days working on it with nerves and no fix. Sad. Thank you hoaca388. Thank you peste. Thank you for your support.

[mferna14]

Dear friends., this Lenovo ThinkBook 15 G4 was 100% working fine till I started to test one USB Power Delivery and USB Type C chip TPS65994AD/AE . The one which I was testing made the motherboard totally dead. Then I re-balled & soldered the Original 100% working TPS65994AD/AE, now it just stuck on 5V. I think the supporting EEPROM U15 program might have got corrupted. Does anyone have the BIN files for U15 (CAT24C256) chip from a working motherboard HLXA4 LA-L931P. I would be very thankful to you guys.
Motherboard Model: HLXA4 LA-L931P Rev: 1A 2022-04-15
S. No : MP2HP316
ThinkBook 15 G4

[bsloboda]

Tomorrow, I will try to grab the laptop and get the bin for you. I have exactly the same model and the charging is all right.

[bsloboda]

Here is the firmware for PD controller U15 CAT24C256WI-GT3_SO8. Extracted with Neoprogramer 2.2.0.10 from laptop:
BIOS: Giga device, GD25R256EYIGR
Lenovo Thinkbook 15 G4 IAP
S/N: MP2EK6MY
MTM: 21DJ009RCK
MO: MPNXB330709A
Motherboard: HLXA4 LA-L931P Rev:1A
Hope I did it right.
Hope it helps.

[mferna14]

Thank you so much for all this trouble you have taken for me... Surely will test & inform you the result. Thanks

[mferna14]

Here is the firmware for PD controller U15 CAT24C256WI-GT3_SO8. Extracted with Neoprogramer 2.2.0.10 from laptop:
BIOS: Giga device, GD25R256EYIGR
Lenovo Thinkbook 15 G4 IAP
S/N: MP2EK6MY
MTM: 21DJ009RCK
MO: MPNXB330709A
Motherboard: HLXA4 LA-L931P Rev:1A
Hope I did it right.
Hope it helps.

The RESULT is all back to NORMAL., I was really thinking to discard this board. But anyway all came back to 20V & get the perfect display. Thank you very much.

[bsloboda]

Fantastic. Happy to read that. Did you flash the bin provided or you repair it other way?