Samsung 300E 4A No display problem

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • razu
    Badcaps Veteran
    • Jan 2015
    • 218
    • Bangladesh
    #1

    Samsung 300E 4A No display problem

    Hy I have a samsung I3 300E4A laptop which problem is no display its all voltage is OK ...... its V core (processor) is 3 Coil, but 2 coils are 1.15v one is 0 volt its voltage come from a dual mosfet the mosfet have no gate voltage but the gate is come direct from Ic . but laptop power running, I heat the chipset clear dust on circuit, still no success

    when i powerd up the dc power supply, then its stop on 0.660 amphare

    Please suggest me any help
    Tags: None
    • dj_ricoh
      Badcaps Legend
      • Jan 2013
      • 2073
      • uk
      #2
      Re: Samsung 300E 4A No display problem

      start with diagram!
      we need it!

      everything its useless. or you can find where that coil comes from (with 0 V)

      trace it on board what QFN chip gives power
      Just cook it! It's already broken.

        Comment

        • tata123
          Senior Member
          • Nov 2013
          • 104
          • Germany
          #3
          Re: Samsung 300E 4A No display problem

          Check the QFN and the black SMD's!
          Attached Files

            Comment

            • razu
              Badcaps Veteran
              • Jan 2015
              • 218
              • Bangladesh
              #4
              Re: Samsung 300E 4A No display problem

              diagram is

              hy friend I have open this dual mosfet which drive the vcore voltage and then resolder it again wowwwwwww its displayed but start on 1 hour then its display is gone again

              is the dual mosfet is AON6908A faulty or V core Ic. its number ISL 95831) and this Aon6908a Gate voltage directly come from V core Ic. i
              Please give me any help
              Attached Files
              Last edited by razu; 03-24-2015, 01:25 AM.

                Comment

                Previous template Next

                Related Topics

                Collapse
                • alro7779
                  Samsung UN55MU6103F video problem; has colored stripes on the display
                  by alro7779
                  Hello, everyone!

                  A co-worker gave me a 55-inch Samsung TV model UN55MU6103F so I can try to fix the following problem... As soon as I plug it in to the wall, the TV turns on, and the display shows a few stripes all over the screen. I took off the back cover and disconnected both ribbon cables that go to the display (one at a time) so by doing that I can narrow down the bad section of the problem, but in both cases the display turns black. I know there are some voltages that I have to check (VGH, VGL, etc.) but don't know what reading each has to show. If anyone could guide me on this,...
                  09-27-2025, 11:29 PM
                • KYBOSH
                  Samsung QN75Q70TAF - Problem ON or WITHIN the Display??
                  by KYBOSH
                  Came across a 75" QLED TV with restart-backlight no boot and it was headed to the dumpster. Asked the owner to let me have a crack at it. They said the TV went out during or soon after a thunderstorm. I noted this but didnt out too much stock into it as it could have been anything.

                  VERY big TV and i was worried about the display cracking during the moved as well as the repair but it was alright as i try very hard to handle with care.

                  In the video (zip file) you can see' as the TV tries to start up, tbere are a lot of gaps in the backlight so I immediately suspect...
                  10-19-2023, 05:33 PM
                • stylishconsultant
                  un60j620dafxza - Samsung No Display Problem
                  by stylishconsultant
                  Hi All,

                  Need help.

                  I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.

                  So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
                  problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
                  might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard....
                  09-04-2024, 03:26 AM
                • Neptune06
                  Display problem on a Samsung U28E590D
                  by Neptune06
                  Hello,

                  I have a display problem (bad size and color) on a Samsung U28E590D and i'm wondering if someone have access to the service manual for this monitor. I used a faulty Lenovo thunderbolt hub connected to it and now i suspect a problem on the HDMI part of this monitor. The main PCB board part number is: BN94-10748G.

                  Thanks for your help.
                  10-02-2023, 05:30 AM
                • Document Archive
                  Acer Nitro Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) Notebook 5 Specification for Upgrade or Repair
                  by Document Archive
                  This specification for the Acer Nitro Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) 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 Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) boardview and Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060...
                  09-06-2024, 10:20 PM
                • Loading...
                • No more items.
                Working...