Re: Acer Aspire S7-392 Power Failure

I'm going to attempt replacing the KBC. Looking under the package with a microscope there looks like a lot of residue. It's a high density BGA package so I might need to send it out to be replaced. I can buy a replacement on ebay...

[url]http://www.ebay.com/itm/Lot-of-iTE-IT8587VG-EXO-IT8587VG-EXO-TQFP-EC-Power-IC-Chip-Chipset-/252094880315[/url]

All the power to the chip is good that I can tell - I know this because the KBC is putting out 3.3V on the KBC_PWRBTN# pin so the chip has power.

Dumb question...does...

Re: Acer Aspire S7-392 Power Failure

The motherboard is a Wistron Storm 2, part number 12302-1, revision 1, if somebody had a BIOS dump I'd be very grateful.
The pin stuck at 2.7V is Chip Select, pin 1.

I will do a more in depth look at KBC power and surrounding components. I have already had to replace one resistor due to corrosion.

Re: Acer Aspire S7-392 Power Failure

Alright, so I was able to reprogram the BIOS using a CH341A programmer I bought on Amazon. I found a .bin file online, but have no idea if it is good or not, all I can tell is that the file size matches up to the size of the PROM.

I did read and save the original .bin file that was on the EEPROM but I don't know how to tell if it was even corrupted in the first place.

Either way, no change to behavior with the new BIOS image on the EEPROM and reinstalled on the board. Chip is getting power, but no activity on clock...

Re: Acer Aspire S7-392 Power Failure

OK, so I think I can find a programmer at work and should be able to flash the BIOS but I'm having trouble finding the .bin file - Acer only provides an extractable .exe with a .fd and some other files in it. Since I'm programming the chip directly rather than through a USB interface, where can I find the .bin?

thanks
-Jason

Hi all
I recently spilled a glass of liquid on my Acer Aspire S7 and since then the laptop has completely died (no LEDs, fans, power of any kind). I am an EE familiar with power electronics, but not really PC power architecture, so I am learning as I work through this.

I've completely disassembled the laptop and am powering just the motherboard with no other peripherals (SSD, fans, etc). I have verified that 19V is good and my 5V_S5 and 3.3V_S5 are good and I also have USB power. I have also validated that the power button sets KBC_PWRBTN# to 0V when pressed. I have not detected...

Re: New Members - please post your introductions here

Hi All
Practicing electrical engineer from the Boston area trying to learn more about commercial computer board design - I work in the defense industry. Specifically trying to get my personal computer up and running so hoping this forum can provide some of the info I need.
-Jason