La-k092p acer motherboard no power

[ahmarzo]

Have acer laptop motherboard la-k092p 3v always not coming but 5 v always is available.no shorting on 3 v coil and 3v enable is not coming how to solve this problem

[mon2]

Re: La-k092p acer motherboard no power

Will work for food..chole bhature?? I think my wife is cooking at least the chole..

1) schematic is here:

https://www.badcaps.net/forum/showpo...69&postcount=1

2) Remove all power. Meter in resistance mode. Measure the resistance to ground of the same enable pin (3V_EN).

Next, meter in DIODE mode. Red meter probe, yes red to ground. Black meter probe to 3V_EN.

What is the measurement?

[mcplslg123]

Re: La-k092p acer motherboard no power

DB1-pin1 & 2 voltage?RB7-pin1 & 2 voltage?

[ahmarzo]

Re: La-k092p acer motherboard no power

Resistance on 3v enable is 1.4mega ohms and voltage on db1 pin no 1 -3 v and pin no 2 -0v
And voltage on rb7 both side 0v

[mcplslg123]

Re: La-k092p acer motherboard no power

Remove RB7/RB1 & DB1. Check resistance to GND on DB1,pin2. If its not showing low resistance, just jumper a wire between pin1-2 of DB1. Hope this will solve your problem.

[ahmarzo]

Re: La-k092p acer motherboard no power

Thanks mcplslg123 my problem is been solved by remove the resistor and db1 and have made jumper on db1.thanks a lot for your guidance.

[mon2]

Re: La-k092p acer motherboard no power

Interesting hard wired bypass but should the EC not have enabled this enable pin on its own?

[mcplslg123]

Re: La-k092p acer motherboard no power

Interesting hard wired bypass but should the EC not have enabled this enable pin on its own?

In theory,thats how it should be. But it wont happen as thermal protection has kicked in. This is just my method to bypass thermal protection on Acer's.I've even replaced SIO,programmed it but thermal protection remains on acer. may be someone here knows another way out. Will look for such suggestions. Lets learn from each other.