hp 630 totally dead

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • ala_borbe
    aka Donald
    • Apr 2011
    • 1625
    • Malta
    #1

    hp 630 totally dead

    hello all
    how are you

    i got a bit of trouble and im asking for help

    got here HP630 with UMA vga

    unit came with smashed LCD and was replaced
    it was working untill battery was drained then turned off

    tested with two good known chargers, not working
    not even led on dc jack

    found schematics, ordered and replaced U1001 (TPS51123) since it was heating much, but all the same
    then upon examining found short on Q1003 (P1203) so i replaced it with FDS4406 and also Q1004 replaced with FDS4406 since thay are near

    still same result, but no more short on fets
    now i have shorts on CE2002 and C1011 but when i take them out thay measure good and shorts remain on pads so short must be elsewhere

    im so bad at this pls help if you can

    sch attached
    Attached Files
    Last edited by ala_borbe; 04-04-2016, 06:33 AM.
    Im Back... sort of...
    Tags: None
    • tibd
      Senior Member
      • Oct 2014
      • 189
      • Sweden
      #2
      Re: hp 630 totally dead

      jp1002, jp1004 and jp1007 if any connected. If so open joints one for one and see if presumed short on c1011 disappears, then from there search which power rail is affected.

        Comment

        • highpulse
          i hate HP
          • May 2013
          • 1488
          • portugal
          #3
          Re: hp 630 totally dead

          hey Donald , tibd is kind right , first does capacitors that was getting hot , belong to wich rail ? if its 19 volts rails , then inject 19 volts on the places you usually found the short . remove all of them who get hot "shorted" after removing all shorts time to see all S3 and S0 for outher small short or malfuctions or possible not ! if you need help let meknow

            Comment

            • highpulse
              i hate HP
              • May 2013
              • 1488
              • portugal
              #4
              Re: hp 630 totally dead

              ohhh wait , c1011 is on 3 v line , so remove the capacitor and chek the coil of 3.3 volts and see resistance to ground ( one prob on the coil and another prob on the ground , start from 200ohm and if it gives 1 " infinite" start growing the class value ohm and let us know wich the resistance you got .
              and btw wich is the ce2002 you are talking about it does not exist :P

                Comment

                • ala_borbe
                  aka Donald
                  • Apr 2011
                  • 1625
                  • Malta
                  #5
                  Re: hp 630 totally dead

                  thank you both, i will try that

                  it was a typo, its not CE2002 its CE1002 and cap C1011

                  il give details a bit later, but tnx for tips, this will continue...
                  Im Back... sort of...

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • Beton
                      Finding a dead short component
                      by Beton
                      Hi guys!
                      I searched for the term "dead short" in the forum but no specific thread came up however if I'm just blind and couldn't see the thread talking about this please forward me to that direction.
                      So my problem is I don't know how to find the source of a dead shorted voltage rail. Dead short = ~0 ohm resistance.
                      I have two VGAs (HD 4850 and HD 4870), both dead shorted to ground on the memory rail. I have the boardview file for the 4870 and the memory rail consists around ~7892346 capacitors...
                      I have a bench PSU and if I try to inject voltage the voltage...
                      12-10-2021, 01:05 PM
                    • Prott
                      Gigabyte GTX1080 - identifying a dead short on vmem
                      by Prott
                      Hey!
                      I have a problem with Gigabyte Aorus 1080. The card seems fine (expected resistance on vcore, pex, 5v, 1.8v, 12v and reset) except for a dead short on vmem (FBVDD). It's interesting failure mode, cause usually (in my experience) when memory fails it still retains a few ohms - this one is literally a dead short.

                      I removed the inductors and tried inject voltage (0.8 V at 6 A) which only seemed to warm up the cables to the card while the card itself didn't show any hotspots.

                      Is there any way to narrow down the search for a short? I would prefer not to remove...
                      07-04-2023, 06:29 AM
                    • DynaxSC
                      Extreme High Current & Low Voltage Short Killer ??
                      by DynaxSC
                      Hi Folks

                      I'm looking for a extreme high current short killer solution for a reasonable cost.

                      I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
                      After taking off the socket, the shorts dissappear again.
                      The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...
                      10-15-2024, 10:13 AM
                    • JimMc0
                      Gigabyte GA-H61M-USB3-B3 dead short 3.3v rail to ground.
                      by JimMc0
                      Hi there,

                      I discovered this forum through a youtuber who teaches electronic repair. I've been trying to troubleshoot my dad's old PC which is a Gigabyte GA-H61M-USB3-B3 and will not power on. I discovered a dead short on the 3.3v rail at the ATX connector so I used a bench power supply to feed 3.3v into the ATX connector and sunk about 400mA into the board (I hope that's not too much!). I used a FLIR camera to identify the problem area:



                      The chip seems to be the following, an ITE IT8892E 1108-CXS which seems to be a PCI bridge?



                      ...
                      03-27-2024, 08:36 AM
                    • Mike Russell
                      Lenovo 14ALC6 - NMD521 - No power, totally dead.
                      by Mike Russell
                      Machine won't power on, no power led, no fan spin, completely dead.

                      Checked PQ5400 - AONS32314 and pins 5,6,7,8 are 20v (AC adaptor voltage) but pins 1, 2, 3, 4 are 0v.

                      Following Gate Pin 4 to PU5400 - BQ24780SRUYR.

                      VCC 20v
                      ACDET 2.8v
                      ACDRV 0v (goes to pin 4 gate of AONS32314).
                      ACOK 0v
                      REGN 6v

                      According to datasheet, conditions are correct for ACOK to be high but it is not.

                      Tracing ACOK it's connected to ACIN which is connected to a pin GPB0 of IT8227 but also shown as connected to +3VL via a 100k resistor...
                      12-25-2024, 08:31 AM
                    • Loading...
                    • No more items.
                    Working...