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A COMPUTER STORE CONFIRMED THAT THE MOTHER BOARD IN MY ACER EXTENSA 5420 IS FRIED AND THAT THIS PROUBLEM IS FREQUENT IN THIS TYPE OF LAPTOP. WHAT WOULD BE THE RANGE OF A NEW BOARD AND IS IT DIFFICULT TO INSTALL... THANKS

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I disagree. Installing a new motherboard in a laptop hasn't been a problem for me.

Of course it became easier after the first laptop, over 20 years ago.

Doesn't take a rocket scientist. Does take a Service Manual, however, if you have never performed this procedure before.

1) Remove all power to the laptop.
Remove the AC adapter (Charger), and the Battery.

2) Buy an ESD wrist strap. (Electro Static Discharge)
The average cost is $3 to $8. You'll find them in a multitude of places. Connect the alligator clip to a good ground source. I connect to the metal frame of an empty desktop computer case. (Doesn't require an Anti-Static Mat, believe me)

3) Use a multi-compartment container for the screws you will remove. There may be as much as 60 screws, and over 12 different types of screws.
(There are screws that look VERY similar to each other! DON'T mix them up!)

Label each container compartment for the area the screws came out of.
You can use a clean egg carton, (Or two), in a pinch. Label each egg holder.

As for a Service Manual here is a link to a free source,

http://www.tim.id.au/blog/tims-laptop-service-manuals/#toc-acer

Look to the right of the heading - Extensa
You won't see 5400 series listed.

You might look at the 5230, and the 5620.
Click on them one at a time.

These are PDF file downloads.
After you click, you won't see anything happening for up to 1 minute.
The file is downloading in the background.

Sorry I can't be more precise, but you can compare with your laptop in front of you.

This is information on replacing a motherboard in a Toshiba Satellite U205 laptop (Notebook),

http://www.irisvista.com/tech/laptops/Toshiba-Satellite-U205-U200/disassemble-laptop-1.htm

I posted it in order to show you clear photos, and directions of disassembling a laptop, and what is entailed.

[You can left-click on each photo to enlarge]

I would like to point out if I may;
For your laptop only ONE motherboard will fit.
The motherboard designed for that laptop.

If the inherent problem is that the motherboard goes bad in these laptops, I believe you would be wasting your time, and money in replacing it.

However, if this what you wish, perhaps check on Ebay for a motherboard.
Also look in Laptops for Parts.

Regards,
joecoolvette

Posted on Oct 08, 2010

  • joecoolvette
    joecoolvette Oct 08, 2010

    Exaggeration

    10 years ago for laptops, around 12 for desktop computers.
    Sheesh!

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Installing a new motherboard for a laptop is no easy task for a experienced hardware technician much less a novice. as the motherboard is dead, I'll suggest to pull out the HDD, memory, dvd drive, etc.. .and purchase a new one.
you can get a disk caddy to extract the data on your old hdd to copy across to the new laptop, so the data you may need is intact.
not what you want to hear, but I hope it helps .. good luck

Posted on Oct 08, 2010

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