Asus ET2702I Bios Rev 1.3 BIOS request

[mon2]

Hi. Have an all-in-one Asus ET2702I that will not power on. The pushbutton is active low and can follow (using boardview file - no schematic available?) - the PB trace. See it go from HIGH to LOW with a button press. But the +12V mosfet does not turn on.

MOSFET in question is @ PQ8906. If we GROUND the GATE on PQ8906, the +12V rail is passed through -> fan starts to spin.

However, the ASUS MONITOR portion of this unit continues to state "NO VIDEO".

Suspecting that the BIOS may be corrupt as the owner was hot swapping the external adapter to get the unit to turn on.

Would someone have a dump of this BIOS or can we download an image from ASUS and it will be the same ?

Believe the FLASH memory device for this logic board Rev 1.3 is @ MEU1.

Thanks for any help / suggestions to repair this unit.

[SMDFlea]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Post the bios backup, and a picture of any white/green stickers on the ram slot with a barcode on .

[mon2]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Thanks. Here you go.

Given that the GATE of mosfet PQ8907 has no signal with the ON / OFF button being pressed - would it be logical to reflash the multiple devices onboard to repair this logic board ?

Found all 3 of the flash devices.

Thanks again.

[SMDFlea]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Just post the 16MB backup please

[mon2]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Thanks SMDFlea. Need to locate my programmer - actually have not yet used the one we purchased (CH341A based). Will do this on Monday. Many thanks.

[SMDFlea]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Thanks SMDFlea. Need to locate my programmer - actually have not yet used the one we purchased (CH341A based). Will do this on Monday. Many thanks.

ok no problem. I recommend you try some different software with it, there`s NeoProgrammer ,AsProgrammer,Colibri and flashrom https://www.badcaps.net/forum/showpo...50&postcount=5

.

[mon2]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Hi @SMDFlea. Found my programmer

Is it ok to use the BOTTOM side SMD pads to dump / program the orginal SOIC device(s) ?

[SMDFlea]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Hi @SMDFlea. Found my programmer

Is it ok to use the BOTTOM side SMD pads to dump / program the orginal SOIC device(s) ?

I don`t know as i don`t have the CH341A black PCB versio,mine are the older ones, green and blue,the pads are on the top but i always use adapters. Just check that the pins are going to the spi 25

Voltage mod -https://www.chucknemeth.com/usb-devices/ch341a/3v-ch341a-mod

[mon2]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Thanks. Finally was able to dump it. Had to modify this BLACK PCB to support +3v3 flash devices. As a default, it is 5V only and can fry the device. Google is my friend

Dump of the MACRONIX MX25L12873F

Welcome your feedback.

[SMDFlea]

Re: Asus ET2702I Bios Rev 1.3 BIOS request

Thanks. Finally was able to dump it. Had to modify this BLACK PCB to support +3v3 flash devices. As a default, it is 5V only and can fry the device. Google is my friend

Dump of the MACRONIX MX25L12873F

Welcome your feedback.

Here you go

[jackcaper]

Hi everybody and especially hello SMDFlea,

my ET2702I (Board Rev. 1.4, not like this 1.3, 16MB flash chip is a 25Q128FV) suffers from the same problem. Is it enough to replace the "PT1270691800" and "BCEE7B19AB44" with my respective identifiers in the cleaned 16MB file and flash it onto my system or is there more to edit?

Thanks for considering to help