Help with BIOS of Acer Travelmate P258 ZRW

[sopik78]

Dear friends,
I have troubles with laptop Acer Travelmate P258-M. With attached BIOS laptop starts with blank screen, all powers up and consumes about 0,45A. But there must be some issue with the BIOS.
I tried many other BIOSes from this and other sites, but always get just 0,11A with no VCORE and other CPU powers.

Can somebody help with my original BIOS?

MB is DA0ZRWMB6G0 rev G UMA

[qayyum786]

Re: Help with BIOS of Acer Travelmate P258 ZRW

try

[sopik78]

Re: Help with BIOS of Acer Travelmate P258 ZRW

Thank you Gayyum786, but still the same, after start about 0,45A, after while drops to 0,31A, with lcd connected 0,52A to 0,37A, but with no image and no sign of any light on lcd.

I dont understand, why this is only BIOS that powers up all power rails, with all other images of UMA or DSC boards starts only with 0,11A and no CPU voltages.

[SMDFlea]

Re: Help with BIOS of Acer Travelmate P258 ZRW

try this one.

[sopik78]

Re: Help with BIOS of Acer Travelmate P258 ZRW

Thanks SMDFLea, but no power on CPU, ampere is 0,11.

This is really strange

[SMDFlea]

Re: Help with BIOS of Acer Travelmate P258 ZRW

Thanks SMDFLea, but no power on CPU, ampere is 0,11.

This is really strange

It isn`t always a bios problem.Check the power on sequence on page 45 in the schematic - https://www.badcaps.net/forum/showthread.php?t=81122 .Good luck

[qayyum786]

Re: Help with BIOS of Acer Travelmate P258 ZRW

try

[sopik78]

Re: Help with BIOS of Acer Travelmate P258 ZRW

Thank you both.

But no CPU power and image on screen with fixed BIOS dump and EC dump. Using original BIOS and new EC all powers up, but no image as well.