Hp CSL50/CSL53 LA-E791P

[Johannes1098]

Ok, found sn number at 003AA00. How long is it? Till the "$END" in the text?

And the code for windows key isn't found in the bin file. So I assume that there was no key saved?

Good news, I got it!!
So with the bios I tried before (f.69 it didn't work) so I used an older one and searched for the SN in the old dump file. And with found, I copied length 1000 and could flash it. First boot up was really long, I already thought it's not working, but as the caps lock blink was away and I heard the Dvd-tray surring, I knew it is Alive again..
Serial number, model number everything is there in the bios!

Thanks for your help hoaca388!

[bbenalmadena]

I just want to say thanks to all, I have a 15-bs037ns v moterboard v 1.0 that I replaced the drive with an SSD, format and after all the updates I use the tool from HP website to update the bios and I got the black screen fan spinng as several others on this thread, shame to HP all the thanks to this posts I managed to recover it

I have used the 08328A.bin and modify it with the old serial, just a post to say thanks to all

[hexagon]

Hello,
i have a laptop with bios update failed. Black screen after failed bios update. Any solution? I'm not quite clear about the needed procedures and identifying the correct bios file.
Does anybody have a replacement file? (CH341A programmer available)

Model: HP 250 G6
SN: CND7495TH3
ProdID:3GJ51ES#ABD
Motherboard: CSL50 / CSL52 LA-E791P Rev: 2.0

[shiyab]

Hello,
i have a laptop with bios update failed. Black screen after failed bios update. Any solution? I'm not quite clear about the needed procedures and identifying the correct bios file.
Does anybody have a replacement file? (CH341A programmer available)

Model: HP 250 G6
SN: CND7495TH3
ProdID:3GJ51ES#ABD
Motherboard: CSL50 / CSL52 LA-E791P Rev: 2.0

hi try

[SMDFlea]

Hello,
i have a laptop with bios update failed. Black screen after failed bios update. Any solution? I'm not quite clear about the needed procedures and identifying the correct bios file.
Does anybody have a replacement file? (CH341A programmer available)

Model: HP 250 G6
SN: CND7495TH3
ProdID:3GJ51ES#ABD
Motherboard: CSL50 / CSL52 LA-E791P Rev: 2.0

Post your bios backup.

[hexagon]

Thanks for the help and the 08328 file. I have the machine back working, everything is right. Serial number, Windows key, all ok.

Modified the file with the needed readout parts from the corrupt bios file, and I managed to lock the manufacture mode. Learned some lessons.
I stumbled about something really stupid. I tried my new programmer to connect, erase, flash, verify and all the usual things with a new 25Q64 chip. To check the needed procedures. Then I flashed the soldered chip in the laptop. At first, I didn't verify. This was the fail. The chip has to be blanked to FFs before writing. I don't know why, I assumed this would not be necessary any more at chips of this generation, but it seems that it's still to handle like an old eeprom.

[cristian_dev]

Re: Hp CSL50/CSL53 LA-E791P

The bios download from HP has 6 different bios`es, different ones for models in the range. Some of them are the full 8MB bios for a single chip ,some are only bios updates or only half the bios for a dual chip bios. Without you having a backup theres no way to tell which bios you need, so just try all the full bios one by one .If you get one working then you will need to fill in the DMI info.

084D4 - 8MB Update,not full bios.Could be 2 X Bios Chips
0832D - Full 8MB Bios
0832E - 8MB Update,not full bios.Could be 2 X Bios Chips
08328A - Full 8MB Bios
08328B - Full 8MB Bios
08445 - Full 8MB Bios

For me 08445 worked. It is F42, I updated it to the latest version through windows 11 on HP 15BS018NQ (F75). And after that followed the guide on https://poweradm.com/hp-manufacture-...g-mode-unlock/ to remove the messages and restore serial number.

Motherboard: CLS50 LA-E791P REV: 1.0. (2017)

Thanks a lot for saving the device!

[kafkaf]

Hello friends
CSL50/CSL52 LA-E791P The image disappeared during the REV2.0 bios update. I am sharing my old bios and product serial number. I would be very happy if you could help me, thank you.
SN: CND7449KB3
ProdID: 1WY08EA#AB8

[hoaca388]

Hello friends
CSL50/CSL52 LA-E791P The image disappeared during the REV2.0 bios update. I am sharing my old bios and product serial number. I would be very happy if you could help me, thank you.
SN: CND7449KB3
ProdID: 1WY08EA#AB8

HP 250 G6 Notebook PC

[kanaia69]

Hello colleages,
I need a bios for hp 15-bs041ns, the motherboard is a csl50 la-e791p rev:1.0 2017-03-10
The problem was that i ipdated with the last bios and after that the laptop starts but there is no imagen on the screen.
I have updated the bios with a programmer with some files but i don't solve anything.
Thank you for your help!!

[SMDFlea]

Hello colleages,
I need a bios for hp 15-bs041ns, the motherboard is a csl50 la-e791p rev:1.0 2017-03-10
The problem was that i ipdated with the last bios and after that the laptop starts but there is no imagen on the screen.
I have updated the bios with a programmer with some files but i don't solve anything.
Thank you for your help!!

Post the original bios backup and the laptop serial number

[kanaia69]

Sorry, I don't have bios backup. The serial number is: CND7182SQ5.
Thank you!

[hoaca388]

Sorry, I don't have bios backup. The serial number is: CND7182SQ5.
Thank you!

Why not ? The bios chip is missing ? Or did you destroy the bios chip ?

[kanaia69]

Why not ? The bios chip is missing ? Or did you destroy the bios chip ?

I have erased the bios with a programmer.

The chip not i write here the info:

BH1709
25864CSIG
P17287

Thank you!!

[hoaca388]

I have erased the bios with a programmer.

The chip not i write here the info:

BH1709
25864CSIG
P17287

Thank you!!

There are 5 bios files here, it will be easier if you don't delete the original bios, you will have to choose the one that suits your device, then you have to fill in all the DMI information again.

[kanaia69]

There are 5 bios files here, it will be easier if you don't delete the original bios, you will have to choose the one that suits your device, then you have to fill in all the DMI information again.

Ok thanks!! I test the different bios and i tell you sthg.

[SMDFlea]

There are 5 bios files here, it will be easier if you don't delete the original bios, you will have to choose the one that suits your device, then you have to fill in all the DMI information again.

15-bs041ns Spec https://support.hp.com/au-en/document/c05519299 - i3-6006U Skylake

It should be BID 08328 .https://www.badcaps.net/forum/troubl...post1737827

[SMDFlea]

Ok thanks!! I test the different bios and i tell you sthg.

Try this one.

[kanaia69]

Try this one.

Thank you very much. I struggling with that, the problem is that the screen is black when i put that bios. I have to test changing the screen of the laptop. I'll tell you sthg.

[kanaia69]

Thank you very much for you help colleagues. I updated the computer with 08328 bios and then i changed the screen and after that, everything is ok. THANK YOU!!!