Hyper-threading disable i5 480m

Hello

I have Acer Aspire 5742 with i5 480m processor and 540m GT nvidia card, yesterday I did terrible mistake changed Bios setting and turned off HT it killed my laptop black screen fan working and laptop turns off after 30s or so. Now I dont know if I killed my CPU or bios needs reseting, tried flashing Bios with recovery mode holding FN+ESC keys, no luck.

tried searching for CMOS battery cant find it, in manual it show's that battery is located under Wi-fi network card, BUT ITS NOT THERE i only found something wich looks like battery but its no so easy to remove. http://i.ebayimg.com/t/NEW-Acer-Aspire-5315-5515-Cmos-RTC-Bios-Battery-GENUINE-/00/$(KGrHqQOKjQE3!8PIKjpBN6Smk1+JQ~~_35.JPG

Before taking any futher action IM going to ask for advice Smiley Happy ?

If I cant get this laptop working again I might as well sell it peace by peace.

Warrenty is already over ;(

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Alan-London

Yep, that's the battery alright. Resetting the CMOS is a pain in the neck and requires more than simply disconnecting the battery. A CMOS reset may well not correct your problem anyway.

I understand that the attempted BIOS flash didn't do the trick but did it actually succeed? I ask because it appears the CRISIS Disk for your model should contain a single ROM file named PEW71x64.fd

You can rename any .fd file (for your model) but, and I can't verify this, it apparently has to be no bigger than 4MB.

You probably know this - your USB needs to be Fat16 or Fat32.

If successful, you can then flash the BIOS of choice in the normal way.

Don't be too hasty in sending it to the breakers yard Smiley Happy

marvellous1

U see I insert flash with fat32 format plug power cable while holding FN+ESC in manual it says ring around power button should flash once, but it doesnt, no reaction whatsoever, I wonder maybe its possible that by disabling Hyperthreading I killed my cpu, so now im trying to find the way how to reset CMOS in my laptop, cant understand why it doesn't have regular cmos battery it looks like this http://i.ebayimg.com/t/NEW-Acer-Aspire-5315-5515-Cmos-RTC-Bios-Battery-GENUINE-/00/$(KGrHqQOKjQE3!8PIKjpBN6Smk1+JQ~~_35.JPG and only way to remove is by soldering ;/

So its 2 options reset my Bios and figure out its CPU or not or just sell for parts and buy new laptop Smiley Sad

Alan-London

According to the service guide (not the user manual) Fn + Esc will, and I quote, 'force the BIOS to enter a special BIOS block, called Boot Block'.

This is not the normal Acer method of installing a BIOS. For this to succeed, you must use a ROM file of type .fd. As I stated in my earlier post, I have read that the ROM is not to exceed 4MB. I cannot verify this, and certainly the service guide makes no such stipulation.

A 'normal' self installing BIOS .exe will not work for the 'Crisis Disk' method described here.

I've had a look at version 1.15 and this appears to fit the bill.

Download and extract 'NEW70115.fd'. Put this single file on your USB (in the root) and rename to 'PEW71x64.fd' (without single quotes). No other files should be present.