Member Avatar for razamughal67

Hello, everyone i have acer aspire 4520 laptop
when we start my laptop and press F2 Button and open Boot Menu when we use ( left , right buttons on keyboard and change Tab ( Information, Boot, Exit ) so it work could not held.And when we change Tab ( Main , Security,)using left right key on keyboard then system is totally Hang. and after 1 minute shutdown automatically. power off And next time when we press on button the laptop can not start.
Some times when we start my laptop so the laptop is not start and power off in 2 seconds. or system boot automatic.
Please tell me what can i do to fix this problem.
Thanks

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Dani AI

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Brief summary and likely direction: the fact that the BIOS (F2) responds to some tabs but consistently hangs on the middle pages, then the machine powers off, and that already booted with HDD/DVD/battery removed, makes drive or main-battery faults unlikely. That pattern usually means the firmware is hitting a hardware fault when it enumerates or queries certain devices (things like onboard controllers, card readers, wireless modules, or chipset sensors) or there is a corrupted BIOS/CMOS state. was right that it could be a motherboard-level issue, but there are a few targeted tests to do first that are cheaper and non-destructive.

Step-by-step tests to narrow it down (do these in order)

  1. Clear the BIOS/CMOS: fully power down, unplug AC, remove the main battery (you already did that), then remove the little coin cell on the motherboard for 5–10 minutes (or use the CMOS jumper) to force a reset. Reconnect and try F2 again.
  2. Rule out keyboard/shorts: try an external USB keyboard and, if comfortable, disconnect the laptop’s internal keyboard ribbon — a short or stuck key can freeze BIOS navigation.
  3. Memory check: reseat RAM sticks and test one stick at a time in different slots; bad RAM can hang firmware.
  4. Remove nonessential internal modules (Wi‑Fi, card reader, modem) and try again — some BIOS screens enumerate those devices and will hang if a module or its connector is failing.

What to inspect if the above fails
Open the case and look for bulging/leaking capacitors, scorch marks, or obvious loose connectors. Check the CPU fan and heatsink for seized bearings, heavy dust, or poor seating; a failing VRM or nearby component can overheat fast and cause an immediate shutdown. Use compressed air and a visual inspection before doing anything invasive.

Cautions and next steps
Avoid reflashing the BIOS until hardware is ruled out — flashing over a hardware fault risks bricking the board. If the laptop still dies quickly or you find physical damage, a repair shop is reasonable (motherboard-level faults are common at this age). Work on a grounded surface, keep track of screws, and don’t power the machine while probing unless you know how to do so safely.

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Member Avatar for BigPaw

Does the power connecter feel loose in the power socket? To test this further remove the battery and connect the power Cable. Turn on the laptop and then move the power cable enough to find out whether moving it turns off the laptop. If it does, then all you need is a replacement connector.

If the above test makes no difference then just check if the mains cable is connected to the power pack properly. Check the condition of the power cable from the power pack to the laptop power connector. You may have to connect the cable to your laptop to see if any movements of the cable affect power to the laptop.

If none of the above helps the identify the problem, then it will need servicing - which will at worst would require replacement of the motherboard. Or, at best (and unlikely) the replacement of a fan or reseating of a heartsink.

Member Avatar for razamughal67

Actually once we thought it is a bettry or power problem.but no.
we try to start laptop with out hard disk & DVD rom & Bettry .
when we open boot setting then press f2 so the first and last 2 tabs work.
then we change second and third tab the laptop fully hang.
i think it is over heating problem.
why the boot setting two tabs options are held .

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