HP 15-p251nv DAY23AMB6F0 (Quanta Y23A) BIOS

[toni31]

The laptop came to me after a good bath of coffee.
I make a good cleaning with isopropyl and flux off spray and then inspection with no sign of damage. Power on MB with 0,77A consumption. Fan is spinning, CPU, GPU warmed up but i can't say the same for FCH and nothing on screen.
I make some measurements.
Voltage is Before PWRBTN/After PWRBTN
PL11: 167k 3V/3V
PL12: 173K 0V/0,959V
PL17: 12,3Ω 0V/0,995V
PL14: 64,6Ω 0V/1.371V
PL16: 9.7Ω 0V/1.098V
PL18:9.7Ω 0V/1.098V
PL21:27.3Ω 0V/1V
PL22: 69.6Ω 0V/1.199V
PL26:0.486K 0V/1.396V
PL24: 203.3Ω 0V/1.136V
PL25: 9K 0V/5V
PL29: 16.6K 0V/3.377V
I can't find the schematic but i think i have all the voltages.
Any help?

[nazrul145]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

try to flash bios.

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

I'm looking around for bios file but no luck

[Pragmatiko]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Here

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Thanks for the file but nothing changed.
Any other solution?

[dj_ricoh]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

What kbc you got?

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Kb9028q c

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Here another bios:
HP 15-p030nr
DAY23AMB6F0 REV.F (Quanta Y23A)
BID022C3 F.29

The bios not resolve my problem i try to find datasheet for KB9028Q_C

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Can anyone tell me if the KB 9028 is programmable

[mehar]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

if you ask me i think it is programmable because kb901X is programmable and has a size of 128kb and it is the series of kb902X and i think this one will be size of 256kb its just my assumption but your laptop is ON than i think it is not kbc problem so first go for reflowing the FCH
wish you all the best.

[meritosari]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

after decrypted file from official hp web site, there are 3 files, i don't know what you need.
2x 4.096kb and 1x8.192kb

make sure your programmer already supporting for new bios chip that has low voltage 1.8v (my opinion)

[toni31]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Thanks
but i think it's 3.3V
Take a look here
http://www.elnec.com/en/device/GigaD...5BSOP8-200%5D/

[crocush20]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Thankyou

[adeellaptop]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

here

thanx its working for me.

[highpulse]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

tony 3.3 and 5 volts will be present on S3 only , meaning that 3.3 and 5 volts will appear on the coils after machine start . chek main vcc lines for KBC as also chek voltage present on powerbutton and bios . i got a machine that wont start up , it does charge , it turn on and off like 1 milisecond (once i press on off ) cheking local stuff no shorts found , thinking in possiblew SIO problem , but without pdf do make extra tests it becomes a bit try it or fuck it .
indeed all KB901X series are programable , major is 128k , but allready had some with 64kb or 256kb , in case you need EC files let me know , also for programing you need to use keyboard socket to wire to your programmer in order to programme SIO

[100nick]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

ec dump, donwload from external site...for test
regards

[carlosparada]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

hi friends... I have the same problem, with same values of PL... can you help me?? Please?

[slavden82]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

Here another bios:
HP 15-p030nr
DAY23AMB6F0 REV.F (Quanta Y23A)
BID022C3 F.29

The bios not resolve my problem i try to find datasheet for KB9028Q_C

with this dump the laptop started up, thanks.

[ravenmx]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A)

try this working 100 %

[fharlock999]

Re: HP 15-p251nv DAY23AMB6F0 (Quanta Y23A) BIOS

thanks you!