Acer one KAV60 bios needed

[String2016]

Re: Acer one KAV60 bios needed

The pin 1 has 0v and connected to the ground pin 2 and pin3 of that chip no continuity on the switch

[String2016]

Re: Acer one KAV60 bios needed

on the ribbon cable on the image i have uploaded here is the readings

pin 1 = 5v
2= 5v
3= 3.3v
4= 17.42v
5= 0v
6= 0v
7= 3.3v
8= 0v

on the first chip pin 1=0v pin2= 0v pin 3= 17.42v
on the second chip pin1 = 0v pin2= 3.3v pin3 = 3.3v

[JaroTech]

Re: Acer one KAV60 bios needed

Is pin 1 of the second chip connected to the switch? If this is the case, this chip is defective or the switch is short to the ground.

[String2016]

Re: Acer one KAV60 bios needed

thanks again for the response jarotech the pin 1 of both 1st and 2nd chip connected to the ground of the switch i have upload the image i put arrow on the connected of pin1 of the chip

[JaroTech]

Re: Acer one KAV60 bios needed

If pin 1 of the two chips is connected to one side of the switch to ground, the other side of the switch is connected to what?

[String2016]

Re: Acer one KAV60 bios needed

this is weird on the other side of the switch is not connected to any of the chip or to any resistor and capcitor downside of the switch board.i have upload image of the backside of the power switch board

[JaroTech]

Re: Acer one KAV60 bios needed

I think the best will be to replace the board with a new one.

[String2016]

Re: Acer one KAV60 bios needed

thanks but the problem i dont have spare power switch board with this i have here different switch board,it is possible to convert this?

[JaroTech]

Re: Acer one KAV60 bios needed

But we don't know how the switch is connected to the ribbon.

[JaroTech]

Re: Acer one KAV60 bios needed

The switch is directly connected to pin 4 (ON / OFFBTN #) of the ribbon, so if you have nothing on the switch, the trace is open somewhere on the board. I just found the schematic of that board.

[String2016]

Re: Acer one KAV60 bios needed

can you please upload the schematics i still cannot find the same switch

[JaroTech]

Re: Acer one KAV60 bios needed

Here you go.

[String2016]

Re: Acer one KAV60 bios needed

i checked based on the schematics there is voltage on c3,r2,r3 and c1 the wrong voltage is on pin 4 on the ribbon cable which is giving 17.42 v

[String2016]

Re: Acer one KAV60 bios needed

problem solved thanks jarotech for the response and help.I found on my scrapboard its acer one d250 same power switch i replaced it problem solved

[JaroTech]

Re: Acer one KAV60 bios needed

I'm glad you found a replacement.

[okbalord]

Re: Acer one KAV60 bios needed

here is the original can someone fix this or share a working bios

ur bios is good i ytry it no problem in it

[Lightboy]

Re: Acer one KAV60 bios needed

hey there again I have the same problem here is it normal that pin 4 has 17v ? or there is a chort somewhere