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Acer aspire 4720z not booting up!

January 25, 2013 at 08:02:14
Specs: Windows XP

All it does is the power button light comes on and a light at the upper left hand corner of the laptop flashes 3 times and a few seconds later it shuts off. A few minutes later the power light comes on automatically and stays on and the corner light flashes again 3 times, the fan kiks in for a couple of secands both times the power light comes on. Please help!!

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#1
January 25, 2013 at 16:47:41

Do you ever see "anything" on the screen?

If it shuts down before even attempting to load Windows then it must be a hardware fault. Could be any number of things, so it's a matter of how you feel about poking around inside - not so easy on laptops.

One quick thing you could try (not too hopeful) is to see if the RAM sticks are accessible under a flap somewhere. If so take them out and clean their edge connectors with a pencil eraser and pop them in and out a few times to clear any oxide off their sockets.

Depending how far you want to go it would be worth ensuring all the connectors you can see are firmly in their sockets.

Keep watching - someone might know that particular computer better than I do and be able to suggest something more.

Always pop back and let us know the outcome - thanks


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#2
January 26, 2013 at 15:22:59

Acer Aspire 4720Z Service manual

There is a lot of diagnosic information on page 73 onwards, however it is quite deep.

If you wanted a visual guide to checking the memory like Derek mentioned, there are visual diagrams on what to do from page 55 onwards


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#3
January 27, 2013 at 09:03:14

try replacing bios button cell battery they tend to have a 5-6year life span

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Related Solutions

#4
January 27, 2013 at 11:16:14

Re #3
BIOS button cell doesn't usually prevent boot up. It can give the wrong date/time tho.

Always pop back and let us know the outcome - thanks


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#5
January 27, 2013 at 15:18:21

A dead BIOS battery would not cause the symptoms he is having. It would still boot and not shut off.

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#6
January 27, 2013 at 20:07:34


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#7
January 28, 2013 at 07:31:49

I have another laptop of the same model that is working and I've replace the bios batt and ram cards from thet one and still no difference. I don't want to replace too many parts from the one that works I may end up messing that one up. Also I've taken it completly apart and reconnected every think back, but it still doesn't work it does the same thing power light comes on, a light at the upper left hand corner flashes 3 times, the fans runs for a few seconds and then the whole thing just shuts off. Thanks for your help and if you have any other suggestions please share!!

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#8
January 28, 2013 at 08:02:01

I'd recommend a brand new button cell battery, any system beeps as it trys to start?

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#9
January 28, 2013 at 08:09:09

No beeps at all, the only noise it make it's the fan and the cd drive. If there are no system beeps at all is that an indicator that it might be the button cell batt or not?

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#10
January 28, 2013 at 11:26:04

It should still boot without the BIOS battery as everyone but dummkopf seems to agree. They are cheap and easy to replace if you want to prove the point but I can about guarantee it will make no difference.

Much more likely things are Power Supply or maybe RAM.

Always pop back and let us know the outcome - thanks


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#11
January 28, 2013 at 12:08:44

a little kick of an extra volt worked for me in the past +cell battery is cheaper :D

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#12
January 28, 2013 at 12:25:43

"a little kick of an extra volt worked for me"

Wow, you just keep burying yourself deeper & deeper


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