HP DV5 Intel/nvidia (Quanta QT6) turns off after 1 second when cold - Solution

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Th3_uN1Qu3
    Believe in
    • Jul 2010
    • 6031
    • Romania
    #1

    HP DV5 Intel/nvidia (Quanta QT6) turns off after 1 second when cold - Solution

    Another quick one. Problem: LEDs light for 1 second then off. After a few dozen tries, or if the laptop is warmed up a little, it works fine.

    Normally this behavior is cold joints on the Northbridge, requiring a reball, but that's on the AMD version with the HD3200 chipset. This one is Intel/nvidia based, and it doesn't have a GPU from the affected series, either. I haven't checked but i think the GPU is a 9400M or a 9600M. Also when the BGA is bad or has cold joints, it does other nasties as well. This laptop showed no problems when it did start up.

    I took some measurements and noticed that GPU Vcore does not come up when it won't start. So i resoldered PU3 that's under the fan there. That one's doing the GPU Vcore.

    It started up first time but after i let it cool down it refused to start once again. I still suspected it to be a cold joint on a power IC, not some BGA, so i took the hot air station and started briefly warming up areas of the board, while pushing the power button. When i reached PU1 it instantly sprang to life.

    I took a closer look at it and what's that... an ISL6262A. It's controlling the CPU Vcore. I remember that from here. CPU Vcore did come up even when it wasn't starting, but i decided to try touching up the solder on that anyway.

    Sure enough, resoldering the ISL6262A fixed it. I have left the laptop powered off for 10 minutes and then turned it back on - no problem. The soldering looked perfect but you can never be sure.
    Attached Files
    Originally posted by PeteS in CA
    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
    A working TV? How boring!
    Tags: None
    • Th3_uN1Qu3
      Believe in
      • Jul 2010
      • 6031
      • Romania
      #2
      Re: HP DV5 Intel/nvidia (Quanta QT6) turns off after 1 second when cold - Solution

      Had another problem with this thing - it would shut down after a few seconds of GPU load - even just enabling Aero. Not reboot or BSOD - hard shut down. If i pressed the power button, it would power back on.

      Tantalum capacitor PC183, the black one under the U1 ISL6262A, was slightly bloated. I don't think it's visible in the pic, but compared to the ones next to the CPU bracket, its top was definitely curved.

      Replaced that capacitor and it no longer shuts down now. This is a fault that could easily have been blamed on the GPU yet it had nothing to do with it. The GPU is a 9200M GS btw - pretty much a piece of crap. But hey, at least it ain't broken.
      Last edited by Th3_uN1Qu3; 12-03-2014, 04:06 PM.
      Originally posted by PeteS in CA
      Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
      A working TV? How boring!

        Comment

        • dj_ricoh
          Badcaps Legend
          • Jan 2013
          • 2073
          • uk
          #3
          Re: HP DV5 Intel/nvidia (Quanta QT6) turns off after 1 second when cold - Solution

          Originally posted by Th3_uN1Qu3
          Had another problem with this thing - it would shut down after a few seconds of GPU load - even just enabling Aero. Not reboot or BSOD - hard shut down. If i pressed the power button, it would power back on.

          Tantalum capacitor PC183, the black one under the U1 ISL6262A,
          the 330uF?

          and the ISL6262A was hot?? or normal temp? i have a sony at work does the same but i saw in a post it was bios corruption so did not even bother to check the Vcore OMG!!

          and i saw this in a few mainboards . one i fix it but i did not knew how i tought it was chipset related cuz i cook the board but it was the IC but when i think now it actually did cook the whole board HAHAHHAHA Irony you could B*#@H
          Last edited by dj_ricoh; 12-03-2014, 04:35 PM.
          Just cook it! It's already broken.

            Comment

            • Th3_uN1Qu3
              Believe in
              • Jul 2010
              • 6031
              • Romania
              #4
              Re: HP DV5 Intel/nvidia (Quanta QT6) turns off after 1 second when cold - Solution

              Yes that 330uF capacitor was bloated.

              The ISL6262A did not get hot. This board maybe had a minor liquid spill at some point which damaged the soldering on the ISL6262A and the cap. It was clean but somebody had changed the thermal paste on the CPU recently - so whoever did that likely cleaned the board of any traces of liquid, too.

              To test a proper "cold start" I put it by the open window and forgot it there - it actually got some condensation when i took it back in , so i waited for a couple minutes before turning it on.

              It turned on first time and works just fine.
              Last edited by Th3_uN1Qu3; 12-03-2014, 04:45 PM.
              Originally posted by PeteS in CA
              Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
              A working TV? How boring!

                Comment

                Previous template Next

                Related Topics

                Collapse
                • Gamer24
                  Lenovo IdeaPad L340-15IRH - NM-C361 turns on and stays on but no CPU Vcore
                  by Gamer24
                  I've been working on this laptop for a weeks it was in another shop the owner was cleaning thermal compound with Akai Dry Spray it's a Video Cleaner and the laptop didn't turn on after and it's been in the other shop for 2 weeks when I got the laptop it had ripped pads for PU702 (SY8286RAC) and the IC was missing from the laptop it's responsible for VCCIO line I've repaired the pads and put in a new IC and and the laptop is turning on fan spins for a second then nothing happens laptop stays on but without Voltage on CPU Vcore
                  here's Some rails and signals I've measured
                  ...
                  10-10-2024, 06:30 AM
                • laos
                  Server Motherboard Quanta S210-X12RS no vcore on CPU
                  by laos
                  Hello,

                  I have continuous BEEP from motherboard on this server after trying to use a GPU on PCIE X16. I have replaced the chipset C602 and there is no more shorts on the board. I have checked ram ddr3 voltages and are ok, but RESET PIN is low (must be high) and no voltage on any of both cpus sockets (with the cpu in the socket).

                  I have checked mosfets and coils and are ok, no short. I think there is no VR_ON from IC of VRM, but i dont have the datasheets nor the pinout of Infineon PX3895EDQG and PX3897EDQG. Any ideas how to check if VRM IC is getting the right signals...
                  01-17-2025, 06:54 AM
                • barry101
                  Apple 820-3662 VCore shorted to ground.
                  by barry101
                  Hi, Would appreciate some help.
                  I have an Apple Late 2013 15" A1398 MacBook Pro with Logic Board 820-3662.
                  Get charger light but no fan spin or chime. No liquid damage.
                  Found PPBUS and VCORE both shorted to ground. Other rails were ok.
                  Removed VCORE MOSFETS U7310, U7320 and U7330. Found U7330 was in fact shorted.
                  With the 3 MOSFETS removed, get PPBUS and fan spin. VCORE is still hard shorted to ground (0 ohms).
                  Attempted voltage insertion on VCORE to locate short using bench supply set at 1.0 VDC and 4.95 Amps (max current for my...
                  06-24-2025, 07:34 AM
                • Stephen
                  MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable
                  by Stephen
                  MacBook Pro 14" M1 Pro Turns on functions then turns off when I plug in USB C cable to reset the computer. I disconnect the battery fully and then reconnect it and it won't turn back on. After letting it sit for a day I plug the battery back up, and the MagSafe 3 cable and it powers on and stays ons, once I plug in a USB C cable into the port closes to the MagSafe port it turns off and the Amber light turns off and won't turn on. No water damage, nothing, I want to do a DFU restore to wipe the computer since the customer stated they did an update and ever since it just decided to not work...
                  03-15-2024, 09:37 AM
                • www
                  LG L192WS-BN backlight turns off after 1 second
                  by www
                  I am testing an old LG L192WS-BN monitor I have that gives an image, but has a backlight issue. When you turn it on the backlight turns on 1 second and it turns off, turns on again, 1 second and it turns off and stays off. Using a flashlight I can see there's still an image.

                  I replaced a bulged cap on the main board, but made no difference. I also got another exact same model monitor that has a broken ccfl (the connector got ripped from the panel and the main screen connector is also broken so I can't use this panel to test), tried using the main board from this one, same issue....
                  03-24-2024, 05:26 PM
                • Loading...
                • No more items.
                Working...