Help identifying old PC104 board

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • fzabkar
    Badcaps Veteran
    • Mar 2009
    • 772
    • Australia
    #21
    Re: Help identifying old PC104 board

    Originally posted by thangzero
    Can I solve this issue if I clear cmos, how to clear?
    https://cdn.badcaps-static.com/pdfs/...f3adcf4f8c.pdf

    Remove the chip and short pin 21 (/RCLR) to a ground pin. There could be jumpers to facilitate this in-circuit.

    The RCLR pin is used to clear (set to logic 1) all the general-purpose RAM, but does not affect the RAM associated with the RTC. To clear the RAM, RCLR must be forced to an input logic 0 during battery-backup mode when VCC is not applied. The RCLR function is designed to be used through a human interface (shorting to ground manually or by a switch) and not to be driven with external buffers.

      Comment

      • thangzero
        New Member
        • Apr 2016
        • 3
        • Việt Nam
        #22
        Re: Help identifying old PC104 board

        It's excactly same your situation. I think i must change RTC. I also can't enter the bios setup the system. Today the system recognize the HDD. thanks for support.

          Comment

          Previous 1 2 template Next

          Related Topics

          Collapse
          • Tynan Dill
            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
            by Tynan Dill
            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

            Upon bringing it home and plugging it up, it showed a standby light.

            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

            The screen seems to blackout and stay black, but with a flashlight I can see the display.

            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

            Assuming...
            ORIGINAL POWER SUPPLY BOARD
            7 Photos
            11-22-2024, 01:46 PM
          • m1ch43lzm
            HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
            by m1ch43lzm
            Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
            Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
            05-12-2025, 08:37 PM
          • howardc64
            TCL 55S425 few horizontal lines, potential failure on both side of panel/buffer board
            by howardc64
            All left and right refers to looking from rear of TV (or looking from front with TV upside down)
            • TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
            • Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
            ...
            07-24-2025, 05:17 PM
          • ugamazing
            Assistance with identifying resistor value on 820-02918 A2992 board?
            by ugamazing
            Working on a 2023 M3 A2992 unit with 820-02918 board, and it uses a new USB-C power architecture, with rectangular controllers. I do not have a perfect-matching board, so have been repairing this one the old-fashioned way (slowly).

            I managed to blow-away a single resistor that I can't find and can't determine the value of. It connects to ground, so I went ahead and stuffed it with a 100K resistor in case it's a simple pull-up. But, I'm now having issues with that side of the board, and am curious if it's possibly related to this resistor! I have no schematics and no board view, so...
            09-06-2024, 08:33 AM
          • Hakuu
            LG OLED77G1PUA - No Video / Audio after a TCON Board change and Software Update
            by Hakuu
            Hi There,

            This TV was auto switching off after few seconds with some vertical lines on the screen, so got a new TCON board and replaced it.

            After replacing the TCON board it was working fine and i set it up with everything, used for few hours, then had the bright idea to update the software on it. During the update process, TV switched off and now no audio or video. No relay switch sound.

            More Details

            TV Model - LG OLED77G1PUA

            Got the same exact TCON board from TVPartsToday and replaced it. But didnt transfer the EPPROM data (didnt...
            07-12-2023, 02:37 PM
          • Loading...
          • No more items.
          Working...