Lenovo Ideapad Gaming 3 15ARH05 NM-D191 processor voltages disappear at startup

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • tomodachi
    Badcaps Veteran
    • Apr 2012
    • 602
    • Turkey
    #1

    Lenovo Ideapad Gaming 3 15ARH05 NM-D191 processor voltages disappear at startup

    MB schematic and boardview
    https://www.badcaps.net/forum/troubl...86#post1802186

    This one came in with no display complaint.
    MB powering up with all CPU coil voltages of CPU and GPU present, appear to be drawing around 1 to 1.8 amps on boot cycle, then in 3 seconds CPU phases on PL3003,PL3002,PL3001,PL3000 disappear, leaving MB drawing only 0.25 amp with GPU core voltages still on.
    Trying to power off pressing power button, 10 seconds of pressing ends up with self reboot with same cycle.

    BIOS, EC firmwares are ok, CPU core IC RT3667 replaced, still same.
    No corrosion, nothing suspicious.
    Unit came in with very, very dirty and clogged fan, giving me idea of loose balls under CPU..

    Any ideas will be appreciated.
    Last edited by tomodachi; 10-03-2024, 04:27 AM.
    Tags: None
    • tomodachi
      Badcaps Veteran
      • Apr 2012
      • 602
      • Turkey
      #2
      Originally posted by tomodachi
      MB schematic and boardview
      https://www.badcaps.net/forum/troubl...86#post1802186

      This one came in with no display complaint.
      MB powering up with all CPU coil voltages of CPU and GPU present, appear to be drawing around 1 to 1.8 amps on boot cycle, then in 3 seconds CPU phases on PL3003,PL3002,PL3001,PL3000 disappear, leaving MB drawing only 0.25 amp with GPU core voltages still on.
      Trying to power off pressing power button, 10 seconds of pressing ends up with self reboot with same cycle.

      BIOS, EC firmwares are ok, CPU core IC RT3667 replaced, still same.
      No corrosion, nothing suspicious.
      Unit came in with very, very dirty and clogged fan, giving me idea of loose balls under CPU..

      Any ideas will be appreciated.
      Update

      Mildly reflowed +VDDCR_VDD mosfets and two tantalum caps sitting across coils out of curiousity, motherboard booted succesfully, but after cool down it won't work again.
      Tomorrow I will do a full resoldering and tantalum replacement and let you know results.

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india
          #3
          Dying PCH due to overheating?

            Comment

            • tomodachi
              Badcaps Veteran
              • Apr 2012
              • 602
              • Turkey
              #4
              Originally posted by mcplslg123
              Dying PCH due to overheating?
              Do you mean CPU itself ? Yeah quite possible. Reball might help

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Its ryzen APU and its known to have dryball joint issue.

                    Comment

                    • mcplslg123
                      Badcaps Legend
                      • Jun 2015
                      • 7262
                      • india
                      #6
                      Before experimenting with reball,observe the status of 1.8V when core voltage disappears.

                        Comment

                        • tomodachi
                          Badcaps Veteran
                          • Apr 2012
                          • 602
                          • Turkey
                          #7
                          Originally posted by mcplslg123
                          Before experimenting with reball,observe the status of 1.8V when core voltage disappears.
                          Thanks for the input. 1.8V was always present.
                          This one worked just fine after resoldering CPU core mosfets. Been testing for a day, so far its working.

                            Comment

                            Previous template Next

                            Related Topics

                            Collapse
                            • Capacitorial
                              Powersupply has all the voltages - Monitor still no power
                              by Capacitorial
                              Hello guys,

                              I have a Philips 240B7QPJEB. The monitor seems completely dead.
                              I opened it and measured the voltages of the powersupply. I found that a mosfet was dead and replaced it.
                              On the connector, that goes to the TCON board, all voltages 15-19V and 5V are present.
                              The small connector on the left of the PSU has two cables with 18V and all the other have 0.2V. It connects on this small connector on the left ontop of the panel. I guess the backlight? Seens fine I guess.
                              The weird thing is, that the Power LED is powered over the TCON board.
                              On The TCON...
                              12-28-2024, 02:12 PM
                            • Document Archive
                              Lenovo IdeaPad Gaming 3 15ARH05 Notebook 3 Specification for Upgrade or Repair
                              by Document Archive
                              This specification for the Lenovo IdeaPad Gaming 3 15ARH05 Notebook 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 Gaming 3 15ARH05 boardview and Gaming 3 15ARH05 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,...
                              09-06-2024, 10:20 PM
                            • Tynan Dill
                              Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                              by Tynan Dill
                              I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                              Upon bringing it home and plugging it up, it showed a standby light.

                              I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                              The screen seems to blackout and stay black, but with a flashlight I can see the display.

                              With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                              Assuming...
                              ORIGINAL POWER SUPPLY BOARD
                              7 Photos
                              11-22-2024, 01:46 PM
                            • gjgib
                              Help reading schematic voltages input/output
                              by gjgib
                              Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.

                              I want to know if there is any post in this forum which explains my questions. A) When, where and how do I know when X voltage line is input or output. Example:


                              I'm battling with this IC to understand it's voltages. It's from non-turning-on Lenovo Ideapad 3 15iil05 - NM-D461.

                              I see some lines like +5VL / +5VALW / V9B+ / +3VALW being okay and some others like 1.8VALW / +0.6VS / +2.5V_DDR. I just know that some of them are bad or missing,...
                              05-06-2024, 08:11 PM
                            • RossMoodley1967
                              HISENSE LCD LED TV MODEL HX40N2176F LED DRIVER SN51DP IC PINOUT AND VOLTAGES
                              by RossMoodley1967
                              Hello

                              Need to know the voltages that will be present on SN51DP ic when tv is in standby and when powered on.

                              Just to elaborate on the problem with the tv 1.set came in with flash of HISENSE logo on screen then back into standby.2. Now tv when plugged in red standby light present to quickly changes to blue but no backlights.3.Then an hour ago i checked again , came on standby and stayed until i pressed the power button which changed to power on (blue)4.As far as the led driver circuit goes voltage at output in standby was 38v , power on led light up voltages rise 58v-68v...
                              03-01-2024, 06:07 AM
                            • Loading...
                            • No more items.
                            Working...