Identify Flawed Motherboards

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Ritalin
    Senior Member
    • Sep 2010
    • 194

    #1

    Identify Flawed Motherboards

    So I notice this forum has a whole section for recap'ing motherboards, and I was wondering how do you know a motherboard has bad caps?(Besides looking at the caps that is) Completely dead? Doesn't boot to bios?

    Since I have been repairing monitors (Up to 10 now) I think it's time to start expanding and learning more stuff to repair.

    Thanks in advance!
  • mockingbird
    Badcaps Legend
    • Dec 2008
    • 5488
    • -

    #2
    Re: Identify Flawed Motherboards

    1) If the capacitors are off-brand
    2) If the capacitors are HN/HM with a datecode before '05 or '06 (not sure)
    3) If the capacitors are KZG or KZJ
    4) If the capacitors are bulged, even if they're known good series

    Comment

    Related Topics

    Collapse

    • madscientist750
      Replacing electrolytic caps by solid caps on old motherboards
      by madscientist750
      I do have several old pc motherboards which i recapped 10 year ago and some of those caps are bulged now.
      I would like to upgrade them using solid capacitors. I do use them for testing and helping some alternative operating systems.
      I would like to ask if such an upgrade can be done, what should i have in mind when replacing electrolytic by solid caps and if such thing exist, if there are caps list for old motherboards. I would have to figure out what caps needs each motherboard and then prepare a list to try to ask for them on some electronics stores.
      10-19-2025, 06:10 AM
    • thesame
      DVR HIKVISION DS-7208HWI-E1/A BOARD DS-80104 REV 2.2 help identify burnt components
      by thesame
      Hy guys , i have a DVR board DS-80104 REV 2.2 that was powered wrong, i have some smds on the board that are blown and i can't identify them , maybe if someone has this board somehow and we can identify the smds', i have searched online and i can't find a schematic.
      The smds are SOT-23-6 , one of them i think it has the marking ADJF since i found another one on the board with this marking , but the other one it seems that it starts with AG or it looks like. I would really apreciate if someone could help me identify those IC's .

      ​...
      02-27-2024, 04:31 AM
    • silver60618
      Lenovo Legion 7 - Help Identify IC
      by silver60618
      Hi gang, its a long shot, but working on Lenovo Legion Pro 7 motherboard NM-F091, and trying to identify this component near GPU with marking "eHFQH" that is burned and shorting the board. Looks like power management IC

      I couldnt find any schematic or boardview. The CPU side also has same chip. Any way to identify this chip? or take measurements from the good chip to determine what it is?

      Any help would be appreciated...
      07-02-2025, 12:16 PM
    • chth96
      How can I identify varistor which have been blew up?
      by chth96
      I mistakely pluged 100v japanese retro game console to 220v outlet.
      So It seems that glass fuse and varistor have been blew up.
      I can identify that voltage and ampere value of glass fuse(250V LF 1.6A),but It is impossible to identify varistor type in my sega saturn PSU(YAMAHA 35M07U XR258)
      Is there any way to identify varistor type in my sega saturn PSU?
      Any reply would be appreciated.


      EDIT:
      It seems that I finally found out what type this black varistor is. It is Panasonic ERZV05D221 “ZNR” Transient/Surge Absorbers (Type D) Varistor Voltage...
      11-26-2023, 08:52 AM
    • freakorio
      Need Help To Identify Component on Ymain LJ41-05120A
      by freakorio
      Hi guys , i hope this is the right place , i got Plasma Samsung PS-50Q91H and i need to repair Ymain LJ41-05120A , but those component are burn and i can not identify to replace those part , and the part are blue capacitor and the location are C5105 and C5106 and here i attach the part that need to identify , and one more thing , i also need to replace Zener Diode on location ZD5502 and the part are BZV55C because mine is short but i don't know the voltage because those parts are release with many type of voltage. Looking forward for your kindly reply
      05-21-2024, 02:32 AM
    • Loading...
    • No more items.
    Working...