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    #1

    Asus A6J laptop: No bootable device insert boot disc ...

    Hi there,

    my laptop ASUS A6J shows an interesting problem.

    After any fresh OS installation (i.e. Windows 8, Vista or Linux), it boots immediately without any problem.
    But if the laptop remains powered off for a tens of minutes, then it does not boot and shows the error:

    No bootable device. Please insert boot disc and press any key to continue...

    It sounds strange because the BIOS always reads the hard disk correctly.
    The SMART functionality also does not show any issue, as well as various HDD tools used for diagnosis (i.e. Hiren's CD, Windows check).

    I have also tried to replace the hard disk, but the problem persists.

    Thus I thought to a battery CMOS problem (since it is older than 10y), I replaced the CR2032 but the issue
    remains exactly the same: cold boot does not work, warm boot is fine (i.e. by booting from a CD/DVD).

    Now the laptop is disassembled on my lab.

    I would check defective caps or whatelse you suggest. The question is that most of the components are SMD...
    It looks a bit difficult for a noob as I am to identify defective parts, capacitors included.

    Thank you for any suggestion.
    Thanks for your help
    Last edited by _max_; 01-14-2013, 09:08 AM.
    Tags: None
    #2
    Re: Asus A6J laptop: No bootable device insert boot disc ...

    It could be a symptom of a dying CR2032 battery. Especially with a 3 year old and later board.
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    Comment

      #3
      Re: Asus A6J laptop: No bootable device insert boot disc ...

      As I wrote, I replaced the CR2032 battery with a new one but has not changed practically nothing...

      Comment

        #4
        Re: Asus A6J laptop: No bootable device insert boot disc ...

        First of all, google for a schematic of ASUS A6J. find your keyb. controller ic and check for cold.

        Comment

          #5
          Re: Asus A6J laptop: No bootable device insert boot disc ...

          I had absolutely no success in looking for a6j schematic... Can someone address me to the right place, please ?

          Comment

            #6
            Re: Asus A6J laptop: No bootable device insert boot disc ...

            Originally posted by _max_ View Post
            I had absolutely no success in looking for a6j schematic... Can someone address me to the right place, please ?
            Here you are.
            Please comment.
            Attached Files

            Comment

              #7
              Re: Asus A6J laptop: No bootable device insert boot disc ...

              Originally posted by Francisco.s View Post
              Here you are.
              Please comment.
              Thank you Francisco, that's what I was looking for.

              The revision is for A6Jc, while the exact laptop model is A6JA-Q002H, I don't know if there are huge differences between models c and a.

              Can I ask where I can look for such schematic diagrams? Your answer, even in PM, would be greatly appreciated

              Comment

                #8
                Re: Asus A6J laptop: No bootable device insert boot disc ...

                Have you made sure the 'new' battery is not bad? A lot of times you will get batteries (especially small watch-type ones) from the stores that are a few years old, and they are sometimes dead by then!

                (My grandparents love cheapo-batteries, so they come to me very often wanting something to be repaired, when it's just a dead 'new' battery :P)
                Muh-soggy-knee

                Comment

                  #9
                  Re: Asus A6J laptop: No bootable device insert boot disc ...

                  Yes, the battery is good and new.
                  After a lot of intensive MemTest86+ without any evidence of failure, the warm reboot went fine. Thus I have replaced the SoDimm module and the hard disk, and a new OS has been installed again. The first boot went fine, but unfortunately the cold boot has exactly the same issue...
                  Today I would prepare the main board for a reflow attempt ...

                  Comment

                    #10
                    Re: Asus A6J laptop: No bootable device insert boot disc ...

                    Originally posted by _max_ View Post
                    Thank you Francisco, that's what I was looking for.

                    The revision is for A6Jc, while the exact laptop model is A6JA-Q002H, I don't know if there are huge differences between models c and a.

                    Can I ask where I can look for such schematic diagrams? Your answer, even in PM, would be greatly appreciated
                    I have no other schematic for that model, and I found it in a webpage, that is not working now.

                    Comment

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