Dell 1558 short to ground

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • jbstokyo
    New Member
    • Jun 2017
    • 6
    • japan
    #1

    Dell 1558 short to ground

    Trying to refresh my knowledge on board level troubleshooting.. I've been out for more or less a couple of decades from repairing laptops and such. Need extra info on any usual or particular components that might also be affected.

    im trying to revive a dell 1558 (DAFM9CMB8C0).. Shorted whenever you plug in the adaptor.

    Mosfet PQ24 and PQ25 is both gone.. replaced.. but still shorted to ground. I have check some resistor and caps to no avail. my next step would be replacing Max8731 charging IC.

    Any addition info or usual components that i should also check that might be the culprit? thank you in advance.
    Tags: None
    • imranromi
      Badcaps Legend
      • Jan 2015
      • 1288
      • Pakistan
      #2
      Re: Dell 1558 short to ground

      When plug in charger gone off or not?
      What short 3v/5v/19v.

        Comment

        • raajkumar
          Badcaps Veteran
          • Mar 2015
          • 354
          • Srilanka
          #3
          Re: Dell 1558 short to ground

          Check all Caps on 19V Line. Check at VCC core GFX Core Mosfet Also.

            Comment

            • jbstokyo
              New Member
              • Jun 2017
              • 6
              • japan
              #4
              Re: Dell 1558 short to ground

              When you plug in the charger or power supply.. voltage drop from 19v to 2v.. mosfet on vcc core over heats so i replaced both.. (si4835d). Still waiting for my order of max8731... i will check other mosfet on vcc and gfx core as well.. thank you.

                Comment

                • emmanuelbill1988
                  Senior Member
                  • Mar 2017
                  • 100
                  • ghana
                  #5
                  Re: Dell 1558 short to ground

                  please you have to check all the caps on 19v line or you can post schematic here

                    Comment

                    • jbstokyo
                      New Member
                      • Jun 2017
                      • 6
                      • japan
                      #6
                      Re: Dell 1558 short to ground

                      Ive replaced a shorted cap, mosfet and max8731 on the 19v rail.. +5v/3.3 alw is now ok... but now the problem is the 1.8v... rt9024pe +5v input is ok but there isnt any 1.8v output.. hoping this is the last bad component.

                      Any replacement fot RT9024PE?

                        Comment

                        • jbstokyo
                          New Member
                          • Jun 2017
                          • 6
                          • japan
                          #7
                          Re: Dell 1558 short to ground

                          Got the unit workin.. thanks everyone for your inputs.. cheers

                            Comment

                            • raajkumar
                              Badcaps Veteran
                              • Mar 2015
                              • 354
                              • Srilanka
                              #8
                              Re: Dell 1558 short to ground

                              Good try. Keep it up.

                                Comment

                                Previous template Next

                                Related Topics

                                Collapse
                                • playit
                                  450watt power supply 5v, 3.3v short to ground wire,in output rail ,connectors
                                  by playit
                                  hello everyone , working zebronics power suply 450 watts , 5v ,3.3v givin short to ground black wire, also in circuit at output, resistor was charred but shows right values , after removing resistors 39ohms, 51 ohms, there was no short , no continuity beeps with ground , but after replacing new resistors (now i am not switching it on) ,again short still exists . when i put bigger ohm resistor like 100k ohm , no short beeping sound comes , lower ohm resistor gives continuity beeps ,other big ones donest , as its a working psu , i am confused what to remove now or how to go further now .
                                  ...
                                  09-02-2023, 02:43 AM
                                • Bowline
                                  Dell E6400 PT434 type Battery Charging Stuck at 1%. Battery Pinouts?
                                  by Bowline
                                  My question pertains to understanding the control circuity inside a Dell PT434 type battery used in Dell E6400, E6410 and other Dell notebooks?

                                  Does anyone have a circuit diagram for the inside of a Dell PT434 battery and/or a description of how the control lines work to control this battery?

                                  My reason for asking is I have a battery which I cannot get to charge beyond 1% in a Dell E6410 or E6400.
                                  The LED bar graph charge indicator on the battery shows one LED lighted when the info button is pressed.
                                  I have tried multiple different Dell power adapters. My Dell...
                                  06-11-2025, 10:13 AM
                                • aaronkatrini
                                  DELL Nvidia GTX 750Ti Mosfet goes short after a few minutes
                                  by aaronkatrini
                                  Hi all,

                                  I have recently picked up this Dell OEM Nvidia GTX 750Ti 2GB Video card. Its an old card I know but still wanted to get it working if possible. The problem is the following:

                                  - Put the card in my testing motherboard and start running Heaven benchmark
                                  - Benchmarks seems to run smoothly up until half way then the motherboard completely shuts off immediately
                                  - Try to start it again and I get a slight move from the PSU fan - a clear short
                                  - A little troubleshooting later I find one shorted Mosfet - Replace them both - short is gone
                                  - Put the...
                                  05-18-2025, 04:18 PM
                                • playit
                                  laptop 19v short circuit dell vostro 1400 motherboard ,need help in repair .
                                  by playit
                                  the comon problem they say , the charger will shut off power once plugged to laptop , i dont have battery, its long gone ago , i use it for backup with adapter and vga port to external monitor(yes no screen lcd) in case my desktop needs fix . one thing for sure i could say the clr resistor - r010 beeps ,short at both sides , the checked all the coils , the 3 coils together gives all of them beeps short along with their respective capacitors . i dont have voltage ampere injection dc machine as in videos i have seen they see where its getting hot and they remove the short and replace components...
                                  02-25-2025, 08:15 AM
                                • MisterAIL
                                  820-00840 / No boot / PP3V3_G3H Short to ground
                                  by MisterAIL
                                  Hello everyone,

                                  Firstly sorry for my english, french guy inside.

                                  I brought a macbook pro A1708 - 820-00840 logic board, wasn't powering on.
                                  History is a day, nothing happened when opening the laptop.

                                  Nothing special inside, no corrosion, no liquid damage, never opened.

                                  First, with the logicboard alone on the desk, mesures are :
                                  5v017 and 0.000 amp. nothing else.
                                  Finding a short on the PP3V3_G3H_VR, but not on the PP3V3_G3H (0.540 on diode mode), PPDCIN_G3H_CHGR_R present (5,1 volts) PPVIN_G3H_P3V3G3H around 4.1 volts. PM_EN_P3V3_G3H...
                                  10-13-2021, 11:42 AM
                                • Loading...
                                • No more items.
                                Working...