Announcement

Collapse
No announcement yet.

Lenovo ideapad 500 power off after 3 sec

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    Lenovo ideapad 500 power off after 3 sec

    I have lenovo ideapad500 with the mother board of la-c851p it was working ok but when i open it and clean fan and replace thermal compaund , the system is not working anymore, the problem is :

    When i press power button, the system is turns on with no display and fan does not spin and after 3 sec it powers off itself, i remove all battery, reset bios , préss power button about 30 sec . But still same, what might be the problem ?? What you advise
    Tags: None
    #2
    Re: Lenovo ideapad 500 power off after 3 sec

    remove everything, and from the beginning, maybe you made a short one! remove (wifi, cd, battery, etc.) and turn on the board, see what happens.
    Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

    >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

    Every donation made will go towards server fees and maintenance costs.

    Comment

      #3
      Re: Lenovo ideapad 500 power off after 3 sec

      Originally posted by peste View Post
      remove everything, and from the beginning, maybe you made a short one! remove (wifi, cd, battery, etc.) and turn on the board, see what happens.
      Dear peste, thanks your quick answer, i did what you told, the laptop is fixed now, when i remove the heatsink the laptop worked ,i think the problem was heatsink were contacting with the capacitors over gpu chip, (but the interesting point was the heatsink were coated with black protector bands) so i apply extra band to over the capacitors on gpu , applied new thermal paste again and installed the heatsink back, now the laptop is working properly, thanks for your advice and help

      Comment

        #4
        Re: Lenovo ideapad 500 power off after 3 sec

        Hi .same board , Shutdown at Lenovo logo. Than if i press power button again don't start until disconnect adapter .without ram stays on .board has GPU too more thing observed CMOS battery is draining very fast.

        Comment

          #5
          Re: Lenovo ideapad 500 power off after 3 sec

          Originally posted by ravi_1617 View Post
          Hi .same board , Shutdown at Lenovo logo. Than if i press power button again don't start until disconnect adapter .without ram stays on .board has GPU too more thing observed CMOS battery is draining very fast.
          check voltage on power button and resistance and voltage on RTC battery

          Comment

            #6
            Re: Lenovo ideapad 500 power off after 3 sec

            Thanks for replying
            Just checked.
            3.275 volts before on
            2.966 during on
            3.216 after shut off

            CMOS shows 60 ohms

            Comment

              #7
              Re: Lenovo ideapad 500 power off after 3 sec

              Where to start from . Thanks

              Comment

                #8
                Re: Lenovo ideapad 500 power off after 3 sec

                Since you are getting display everytime, i dont think its RTC issue. I'll bet for bad kbc and suggest to replace it.

                Comment

                  #9
                  Re: Lenovo ideapad 500 power off after 3 sec

                  Originally posted by ravi_1617 View Post
                  Hi .same board , Shutdown at Lenovo logo. Than if i press power button again don't start until disconnect adapter .without ram stays on .board has GPU too more thing observed CMOS battery is draining very fast.
                  Hi ,Problem was of adaptor, user was using 2.25 Amps.Has to be 3. Amps above.
                  Thanks

                  Comment

                  Previous template Next
                  Working...
                  X