Asus X1503ZA

[adrianmihai83]

Dear forum members,

This is my first post here, I am searching for a bios dump for an Asus X1503ZA.

Laptop responds to power button but shuts down after 3-4 seconds. I have measured all voltages and seem to be present, when I power on, the 3.3V apear on pin 8 of the bios chip (GigaDevice 25R128E).

No post, no image, nothing.

I have made a dump of the chip, I attach it here also.

My impresion is that the firmware is corrupted and I am searching for a dump of the chip for this model.

Best regards,
Adrian

[SMDFlea]

Serial number is: N4N0CV087826165

The QR code from the motherboard is attached.

I also attach a picture from the bios when it was working.

Thanks

try this bios.

[SMDFlea]

Type the 15 digit laptop serial number, motherboard model.
read the forum rules..https://www.badcaps.net/forum/troubl...before-posting

Also, post a picture of the barcode sticker or QR code on the motherboard, or scan the QR code and post what it says

[adrianmihai83]

Serial number is: N4N0CV087826165

The QR code from the motherboard is attached.

I also attach a picture from the bios when it was working.

Thanks

[SMDFlea]

Serial number is: N4N0CV087826165

The QR code from the motherboard is attached.

I also attach a picture from the bios when it was working.

Thanks

try this bios.

[adrianmihai83]

Thank you for the bios file, tried it, unfortunately does not work. The computer, with or without battery attached, responds to power button, the white power on led light up for a couple of secconds and then shuts down. The amber battery led lights up (with or without the battery attached) and stays on a couple of secconds after the laptop shuts down by itself, no post, no display...

I will take out the board to check all the power lines, probably there is a short somewhere, don't know what is on the other side of the board, on the up face there is no obvious evidence, but... will see.

If there are suggestions, I am happy to take them into consideration.

Thanks

[adrianmihai83]

Well, just put the laptop under thermal camera, without removing the motherboard. Because nothing was overheating I decided to press the power button multiple times, to not let the laptop shutdown, maybe I can see something under the thermal camera.... and.... what do you know.... laptop started, went into bios...

I am using it for 2 hours now and everything seems ok... what happend exactly I cannot explain

[m1ch43lzm]

Perhaps a faulty power button?

[adrianmihai83]

Not the case as the laptop started everytime on first press, to stop immediately, a sticky button cannot be the cause, faulty, sure not

EDIT: Speculation, the EC chip got corrupted in some sort of a way (the problem appeared after I changed the LVDS cable as I had screen problems, in fact the LVDS cable was torn apart near the hinge)

EC read the power button, started system but beeing corupted, stopped. I did reflash te bios with the file above, tried to start multiple times with the new bios but nothing changed in the behaviour of the laptop as EC reflash could not be triggered because the laptop shut down too quickly. As I insisted with pressing the power button, the system did not shut down and triggered the update, as I had 206 version before and the reflashed bios is 306, maybe it is bundled together with the EC flash.... This is my best guess, I may be halucinating but.. I cannot find other answer, as the laptop is working for some hours now, with multiple resets, shut down, with or without charger.... as nothing ever happened.

Even before when it was not starting, on the side of the mainboard that could be visible (I don't know if there is something else on the other side as I did not take the board out) all the voltages were right, arrived at the voltage for RAM and my findings were that the signal for the gate of the mosfet responsabile was not coming when starting the pc, that is what made me think that there is a firmware problem (not to exclude something down that route in short, clearly no short as everything is fine now)

EVEN LATER EDIT: this was killing me so went investigating, I have attached the photo in first post with the Bios 206 when it worked in the past

on bios 206 it was EC Version: F00A2404.306
on bios 306 it is EC Version: F00A26C4.30B

This is solved now and I can sleep