No ACER logo at switch on

2»

Answers

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    As earlier mentioned, I think the BIOS coin cell battery on the mainboard is completely dead or dead shorted. Coin batteries are not rechargeable and only have an 8-10 year shelf life. Your machine is 15 years old!

    To try to confirm this, boot into WinXP.  Then re-start, NOT shutdown, WinXP. When the screen goes black, then start tapping the F2 key to see if the BIOS setup screen appears.

    Jack E/NJ
    Morning! If I restart Win Xp and I press F2 as you suggested I still get the continuous beeping :( 
  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    OK. Remove the bottom cover. Try to find the BIOS chip coin cell battery as shown below. Disconnect and remove the coin cell  from the mainboard. Then replace the bottom cover. Then press and hold the F2 key. Then turn the machine on again. Jack E/NJ



    Jack E/NJ

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    OK. Remove the bottom cover. Try to find the BIOS chip coin cell battery as shown below. Disconnect and remove the coin cell  from the mainboard. Then replace the bottom cover. Then press and hold the F2 key. Then turn the machine on again. Jack E/NJ



    Do you have somewhere a procedure to remove the bottom cover that I may read? This seems not easy... 
  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    FRANCO64 said:
    JackE said:
    OK. Remove the bottom cover. Try to find the BIOS chip coin cell battery as shown below. Disconnect and remove the coin cell  from the mainboard. Then replace the bottom cover. Then press and hold the F2 key. Then turn the machine on again. Jack E/NJ



    Do you have somewhere a procedure to remove the bottom cover that I may read? This seems not easy... 
    IIn addition ... if the laptop finally loads XP, it should mean that the BIOS works and "manages" the operatons until the OS is started. Why should it be unpowered or short circuited? How could it work if it is not powered? 
    On the other hand, does exist in the BIOS a commando that keeps the screeon black during power on? Maybe this command has been given accidentally ...

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    FRANCO64 said:
    JackE said:
    OK. Remove the bottom cover. Try to find the BIOS chip coin cell battery as shown below. Disconnect and remove the coin cell  from the mainboard. Then replace the bottom cover. Then press and hold the F2 key. Then turn the machine on again. Jack E/NJ



    Do you have somewhere a procedure to remove the bottom cover that I may read? This seems not easy... 
    I found the battery. It is under the keyboard. I remeoved it and measured its voltage. Even if the date code il 1993 it still provides 2.9Volts!!!
    However, without the battery and even after shortcircuiting the battery plug on the motherboard the Laptop behaves exactly the same ...

  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    No! The battery is 27 years old! The primary coin cell is considered dead with an open circuit voltage below 3volts. It should be 3.1volts or more. Try replacing the coin cell. Jack E/NJ

    Jack E/NJ

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    No! The battery is 27 years old! The primary coin cell is considered dead with an open circuit voltage below 3volts. It should be 3.1volts or more. Try replacing the coin cell. Jack E/NJ
    I replaced the coin cell. It is a CR2032 and I had some at home.
    After I replaced the battery ... DISASTER. Now the screen remains blank and the XP never starts. No more blinking of the caps and HDD leds. Maybe the bios got cancelled while I removed the power and changed the battery?
    Any idea of what I shall do now?
  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    Yes CR2032. But were they tabbed & pre-wired with the connector? Are you sure the polarity is correct? Jack E/NJ

    Jack E/NJ

  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    After you check the new coin cell polarity is correct, then try to enter the BIOS setup again with F2 key on startup. Jack E/NJ

    Jack E/NJ

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    After you check the new coin cell polarity is correct, then try to enter the BIOS setup again with F2 key on startup. Jack E/NJ
    The laptop is dead. After switch on no leds blinking, no effects touching the keyboard, only the fan is working. Any suggestion on how to re-write the BIOS?
  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    Did you check the polarity of the coin cell connector? If it's OK, then re-check your re-assembly for possible loose connections. Changing the coin cell does NOT explain this result unless the connector polarity was reversed. Jack E/NJ

    Jack E/NJ

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    Did you check the polarity of the coin cell connector? If it's OK, then re-check your re-assembly for possible loose connections. Changing the coin cell does NOT explain this result unless the connector polarity was reversed. Jack E/NJ
    Morning! I believe the problems reamain that at power on the screen is not operative. Before the BIOS was working and starting the computer (even if in an "invisible" way). Now, leaving the BIOS totally unpowered for a while, maybe at the start up the computer needs some input but we do not know and remains there for ever ...
    Do you know where the CMOS short-circuit bridge is in the ASPIRE 1520? I would like to try a full reset ...

  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    Just remove the CMOS battery connector. Then short the mainboard pins. You did it this way earlier with the old 1993 CMOS battery. Then later we removed the old CMOS battery and the laptop still invisibly booted to WinXP. Like I mentioned, unless the polarity of the new CMOS battery was reversed, it doesn't explain why it's not booting to WinXP now. Jack E/NJ   

    Jack E/NJ

  • FRANCO64
    FRANCO64 Member Posts: 19

    Tinkerer

    JackE said:
    Just remove the CMOS battery connector. Then short the mainboard pins. You did it this way earlier with the old 1993 CMOS battery. Then later we removed the old CMOS battery and the laptop still invisibly booted to WinXP. Like I mentioned, unless the polarity of the new CMOS battery was reversed, it doesn't explain why it's not booting to WinXP now. Jack E/NJ   
    No worries Jack. It was a very old laptop and I bought it pre-owned. I took the chance to buy a new one.
    Thanks a lot for your efforts!
  • JackE
    JackE ACE Posts: 45,211 Trailblazer
    You probably would've also needed to upgrade RAM & HDD to meet a bare mininum Win10 system requirements. And likely would've been painfully slow with first generation 2GB max DDR memory  and old IDE HDD technology. I think you made the right decision. Jack E/NJ

    Jack E/NJ