Dell 400SC

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Cpmiller22
    New Member
    • Mar 2011
    • 1
    #1

    Dell 400SC

    Hello-

    I'm new to the forums. I have a dell 400sc that has started rebooting intermittently and after some research I noticed my caps were bad (bulged and leaking). I ordered replacement caps (nichicon 820 6.3v) and replaced them on my board. After I put things back together, when I push the power switch everything spins up for barely a second but doesn't actually turn on. Any thought/suggestions would be much appreciated!

    Chris
    Tags: None
    • dood
      Deputy dood
      • Mar 2004
      • 2462
      • USA
      #2
      Re: Dell 400SC

      Sounds like a short somewhere. Check your soldering to make sure you didn't bridge any connections, and make sure the board is mounted properly in the case.
      Ludicrous gibs!

        Comment

        • delaware74b
          Badcaps Veteran
          • Apr 2009
          • 628
          • USA
          #3
          Re: Dell 400SC

          You could also have a replacement cap reverse polarity. Reverse caps will cause power supply to 'fold back' and shut down. How do I know...... been there, done that, got the t-shirt.
          Stupidity should be a crime, especially for drivers. I have NO patience for them.

            Comment

            • Uranium-235
              Comrade Glimmer
              • Aug 2007
              • 5042
              • US
              #4
              Re: Dell 400SC

              I had a gx270 do the same thing on me after replacing some caps backwards. switched them all out again and it still did it =/
              Cap Datasheet Depot: http://www.paullinebarger.net/DS/
              ^If you have datasheets not listed PM me

                Comment

                Previous template Next

                Related Topics

                Collapse
                • 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
                • siuras676
                  Dell XPS Plus 9320 blue screen and rebooting
                  by siuras676
                  Hi everyone,
                  I have a Dell XPS 9320 in for repair, and the machine has a strange issue.

                  First, a bit of history: the laptop came in after liquid damage and was completely dead. I've repaired all the broken traces, replaced the damaged components, and it now powers on.

                  However, it's now showing a Windows blue screen related to hardware (as seen in the picture), along with another Dell error I've never seen before.

                  Has anyone encountered this issue on a Dell machine before and could point me in the right direction? I've checked the power rails around...
                  2 Photos
                  04-07-2025, 12:10 PM
                • Akhlz001
                  Dell Pro 13 Plus PB13250 Bios Unlock
                  by Akhlz001
                  Hi,

                  Could someone help trying to unlock this BIOS, seems that Dell have changed the layout of new Dell Pro 8FC8 bioses from checking HXD - 4000 bits do not need changing, only 2000. However after FF the section starting from '01000' upto 2000 bits and then soldering the chip back it seems that the microchip on the motherboard is recovering the bios back to original settings after first boot. Has anyone found a way to crack this extra layer of security Dell have implemented? Seems both HP and Dell have upped bios security to match Lenovo by implementing extra measures on a separate...
                  09-20-2025, 07:15 PM
                • master3112
                  Dell Inspiron 5590 Board 18778-1 no charging, charging not possible
                  by master3112
                  I would like to share my experience about charging issues with Dell power supplies with the tech community. I am working on a Dell Inspiron 5590, Mainboard 18778-1 with charging problems. The device can be switched on and works so far, only the message appears at startup:

                  Alert! The AC power adapter wattage and Type cannot be determined. The battery may not change. The System will adjust the performace to match the power available.

                  The power supply unit is not recognized in the Bios and the charging process is set to "idle". I use original Dell battery, type...
                  07-29-2025, 01:55 PM
                • SMDFlea
                  Dell Thunderbolt Firmware
                  by SMDFlea
                  Dell thunderbolt firmware, extracted from dell firmware update exe. Padded to 1MB.

                  Some models have a choice of 2 different firmwares, it depends on the dell SKU.
                  The SKU is in brackets (****)

                  EDIT: NVM65...
                  01-26-2025, 06:22 AM
                • Loading...
                • No more items.
                Working...