Acer Aspire 5335 power problem

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • menshawy
    Badcaps Veteran
    • Aug 2013
    • 398
    • egypt
    #1

    Acer Aspire 5335 power problem

    hi
    i have power problem with Acer Aspire 5335
    m.b 0620_08219-SB_4K801
    at first power SW was broken and i found pin8 in spi flash rom (u50) is shorted with GND
    after i changed sio (u39) KB3310QF i found 3.3v on spi rom (u50) pin8 and sw1 pin1,3 put there is no 3.3v and 5v s5 on l20 and l3`
    after replace u37 tps51125 and reprogram bios i found 3.3v on l20 and 5v on l3
    but the machine dont bower on
    i found u39 pin 103 RSMRST#_KBC is 0.9v and SRTCRST# on c73 is 0.7v
    after replace ICH (u16) the machine on OK and display OK but without backlight and without power SW Response (when i remove RTC battery the machine power on automatic, when i put RTC battery and press ws1 the m.b don't power on )
    when i press power SW u39 KBC_PWRBTN# 3.3v then go to 0V, then go back to 3V but pin 101 PM_PWRBTN# is only 3.3v dont go to 0v if i short d21 pin3 with gnd the m.b power on
    d21 pin1,3 is 3.3v dont change with press sw1
    RN74
    pin1 3D3V_AUX_S5 3.3v ok
    pin2 GND
    pin3 BLON_OUT 0v (after power on)
    pin4 KBC_PWRBTN# 3.3v (go to 0V, then go back to 3V when press sw1)


    help please
    Attached Files
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Acer Aspire 5335 power problem

      Voltage on D9 all pins?? Voltage on C354?? You said voltage on C73 is 0.7V and that indicates problem with RTC and you need to fix this first. Try removing C73 & C354 one by one and see if you get close to 3V on RTCRST# & SRTCRST#. Btw, RTC cell must be 3V.

        Comment

        • piernov
          Super Moderator
          • Jan 2016
          • 4435
          • France
          #3
          Re: Acer Aspire 5335 power problem

          He already replaced ICH to solve the issue on SRTCRST#.
          If PM_PWRBTN# doesn't drop when KBC_PWRBTN# is triggered it sounds like there's an issue with the EC (bad replacement or not soldered properly maybe). BLON_OUT is also managed by the EC on this board.
          Or if the BIOS was flashed maybe it wasn't the correct file.
          Last edited by piernov; 02-20-2021, 04:59 AM.
          OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

            Comment

            • menshawy
              Badcaps Veteran
              • Aug 2013
              • 398
              • egypt
              #4
              Re: Acer Aspire 5335 power problem

              Originally posted by piernov
              He already replaced ICH to solve the issue on SRTCRST#.
              If PM_PWRBTN# doesn't drop when KBC_PWRBTN# is triggered it sounds like there's an issue with the EC (bad replacement or not soldered properly maybe). BLON_OUT is also managed by the EC on this board.
              Or if the BIOS was flashed maybe it wasn't the correct file.
              thanks my friend
              i was replace another IO and resoldered it and change bios file

                Comment

                • menshawy
                  Badcaps Veteran
                  • Aug 2013
                  • 398
                  • egypt
                  #5
                  Re: Acer Aspire 5335 power problem

                  finally i solved it
                  BRIGHTNESS problem solved by remove R457 and solder pin2 of it with R241 pin2 with F3 PIN2 (3D3V_S0)
                  power press problem solved by remove R8 and connect d21 pin1 to sw1 pin1,3
                  thanks for help

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • Document Archive
                      ACER Aspire Aspire G7200 Predator Defender Aspire 9750 Specification for Upgrade or Repair
                      by Document Archive
                      This specification for the ACER Aspire Aspire G7200 Predator Defender can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Aspire Aspire G7200 Predator Defender boardview and Aspire Aspire G7200 Predator Defender schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer...
                      09-12-2024, 03:28 PM
                    • Document Archive
                      ACER Aspire Aspire X1300 Aspire Specification for Upgrade or Repair
                      by Document Archive
                      This specification for the ACER Aspire Aspire X1300 can be useful for upgrading or repairing a desktop PC that is not working. As a community we are working through our specifications to add valuable data like the Aspire Aspire X1300 boardview and Aspire Aspire X1300 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or...
                      09-12-2024, 03:28 PM
                    • Document Archive
                      Acer Aspire Aspire One 532h Netbook One Specification for Upgrade or Repair
                      by Document Archive
                      This specification for the Acer Aspire Aspire One 532h Netbook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Aspire One 532h boardview and Aspire One 532h schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or...
                      09-06-2024, 05:27 AM
                    • DenK
                      Acer Aspire 5 A514-55 - won't power on, no charger LED, battery not flat - usual suspects?
                      by DenK
                      Dear all, I am trying to troubleshoot an Acer Aspire 5 A514-55 that won't power on. I'll describe the symptoms and my findings so far, and I would like to seek guidance and suggestions on possible suspects in terms of cause/component failure. My initial thoughts are battery charger IC and/or ideal diode/MOSFET (that switches between incoming DC and battery power), but I could be totally wrong on this.
                      1) Laptop was working fine on battery, then user realised battery was running low. Plugged in AC adapter but noticed it was not charging (LED on AC adapter plug did not light). Eventually shut down
                      ...
                      12-06-2024, 01:29 AM
                    • Bonaventure Vigil
                      ACER ASPIRE A515-52G CAN ON BUT NO DISPLAY, NO POWER AT VCC_GT
                      by Bonaventure Vigil
                      Dear All,
                      Please really2 need Help on this Acer A515-52G Motherboard Compal EH5AW LA-G521P Rev: 1A.
                      At first this laptop can on, keyboard light on but no display. Open the motherboard, found out the PQZ3 Mosfet and PUZ3 ic near it burn. Refer picture below. Then I replaced both. All the power rail 3.3,5,1.2, 1.35, 0.8V have power back after i turn on the laptop except for the VCC_GT rail. Voltage at Power Supply showing 0.000A before turn on, after turn on it became 0.5 0.6A. Seem cannot boot and still no display. Then I replaced the PUG1 and mosfet, but the VCC_GT still no power....
                      12-12-2024, 10:22 AM
                    • Loading...
                    • No more items.
                    Working...