Hannspree HT231HPB - PSU Question

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • JFunc
    New Member
    • Mar 2022
    • 9
    • Scotland
    #1

    Hannspree HT231HPB - PSU Question

    Hi there!

    I have been given a non-working HT231HPB monitor to repair. The owner has misplaced the stock PSU, so I will power it from my bench supply.

    However, before I start troubleshooting it, is there anyone out there that could please tell me what the polarity of the stock PSU is?

    If you could tell me if it's center pin positive or negative...even better, if you could post a picture of the power brick label, that would be extremely helpful.

    Looking forward to hearing from you!

    Cheers!

    Andy.
    Tags: None
    • JFunc
      New Member
      • Mar 2022
      • 9
      • Scotland
      #2
      Re: Hannspree HT231HPB - PSU Question

      On further internet investigation, and squinting at low res images...it seems to suggest center pin positive, but if someone could clarify for sure, that's be amazing...

      A.

        Comment

        • dougieT
          Member
          • Aug 2022
          • 16
          • United Kingdom
          #3
          Re: Hannspree HT231HPB - PSU Question

          Originally posted by JFunc
          On further internet investigation, and squinting at low res images...it seems to suggest center pin positive, but if someone could clarify for sure, that's be amazing...

          A.
          For unknown connector polarity I've traced from where the centre pin enters the PCB to where there is a polarised component, an electrolytic capacitor is a good one to find.

          Dougie

            Comment

            Previous template Next

            Related Topics

            Collapse
            • DynaxSC
              Need real mobo dump of BIOS v402 for ASUS PRIME Z590-A - stock image no help
              by DynaxSC
              Hi,

              I have a serious problem to program the Z590 chipset SRAM with a Management Engine after replacing the chipset.
              The new chipset is factory new and is not containing any Management Engine. Any attempts to program it into the chipset under Windows ends with a failure (eg. Error 20: Management Engine Device not present, or something similar).
              Due to the lack of the ME several ports on the board, including all M.2 ports aren't working, booting OS works only on USB. So it's now other way, as to program the chipset with a ME.

              Usually on ASUS boards it worked...
              06-14-2024, 03:49 PM
            • Dev Goose
              Help Needed: Reverse Polarity Issue on HP EliteBook 840 G4 – Where Do I Begin?
              by Dev Goose
              Hi everyone, I recently acquired an HP EliteBook 840 G4 (6050A2854301-MB-A01) that I'm hoping to bring back to life. I'm fairly new to laptop repairs but eager to learn and willing to put in the effort to understand and fix this. Any advice or guidance would mean a lot!


              What Happened
              The issue started when the laptop was accidentally plugged in with reverse polarity. Before this incident, the laptop would show a power/charging light whenever it was plugged in. However, now it's completely unresponsive—no lights, no power, nothing. I've been doing some research and understand              ...
              12-13-2024, 03:13 AM
            • DynaxSC
              MSI PRO B660M-G DDR4 - real bios dump from board needed (no stock bios)
              by DynaxSC
              Hi, I have an MSI PRO B660M-G DDR4 board with damaged BIOS and i need a bios dump from a real board, along with MAC, UUID and Serial Number info (eg. a BIOS screenshot and pictures from the board stickers).

              I need to reconstruct the bios on my board, based on another bios image form a real board - meaning a bios image containing MAC address, UUID and Serial number. A stock BIOS is not suffiecient, as it is impossible to discover where the MAC, UUID and SerialNumber are stored. Tried with a similar board, but there are too much differences, and the stock BIOS is missing a lot of...
              11-17-2023, 10:56 AM
            • Zibbo
              Lenovo T470P NM-B071P not charging, 20 volts on positive +ve battery terminal
              by Zibbo
              Lenovo T470P NM-B071P had no power. PQ2 and PQ11 were shorted, repaced them and laptop turned ON. Connected the battery and the motherboard turned off immediately and it won't charge, checked the voltages and found out that there is 20v on the positive battery terminal.
              Replaced battery charger IC PU101 and the two switching mosfets PQ101 and PQ102 and still same problem. Now I can't figure out how 20v is ending up on the battery terminals.
              12-27-2024, 12:20 AM
            • AkaBukai
              Is it okay to flash stock bios onto the motherboard's BIOS?
              by AkaBukai
              Hi there,
              I have a 14" Lenovo Laptop (Flex 5 14ALC05) which has a boot issue.
              The little LED on the power button is flashing slowly and nothing happen.
              This unit do not have any BIOS button cell battery so I tried many times draining the power but it is still not powering on.

              So I decided to flash the BIOS using a cheap programmer.
              And I was successfully able to read the content (exactly 16MB file) which BTW is a WINBOND 74m12jwsiq (according to the package inscription - but detected as W25Q128FW in the software - IMSProg on Linux)

              I also...
              12-19-2024, 12:15 PM
            • Loading...
            • No more items.
            Working...