I found a short on a mosfet in the vrm and used my air station to remove the bad component. and after viewed my work and noticed that had also blew the cap above it off as well... it went to cap heaven. I don't need the boardview file just what cap values are needed to replace the component. This is on a gigabyte r927xoc-4gd Windforce. I am a novice at repairing as that was a rookie mistake, + side is removal of the shirted package cleared up the short.
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I will check the other packages that look identical. I also have a b450 steel legend I am stabbing around with and Have a suspect short , being new at this I will second guess myself. Measure twice cut once has always been a rule of mine. I have a 8 leg mosfet not reading ground on any of the legs.All the others read a ground on 1 leg., there are 3 of them the same component. Should that mosfet be reading a ground or is it shorted? I am checking the surrounding caps and they have ground. That to me indicates a short. Is there a cap or some other part that would disrupt the ground rail on the board?
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I'm no fan of hot-air. For me, a soldering iron is better in most every way. If you want to use hot-air, mask off the surrounding area with aluminum foil and/or Kapton tape.
Isn't this just one of multiple copy and paste switching regulators that have the same component?Comment
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Hello everyone,
Firstly sorry for my english, french guy inside.
I brought a macbook pro A1708 - 820-00840 logic board, wasn't powering on.
History is a day, nothing happened when opening the laptop.
Nothing special inside, no corrosion, no liquid damage, never opened.
First, with the logicboard alone on the desk, mesures are :
5v017 and 0.000 amp. nothing else.
Finding a short on the PP3V3_G3H_VR, but not on the PP3V3_G3H (0.540 on diode mode), PPDCIN_G3H_CHGR_R present (5,1 volts) PPVIN_G3H_P3V3G3H around 4.1 volts. PM_EN_P3V3_G3H... -
Samsung UN55ES7003
made house call.
red power led comes on, blinks twice, no display, no backlight, relay clicks, repeat.
psu has self test feature.
disconnected from mainboard.
determined PSU ok BL ok.
suspect mainboard.
disconnecting tcon has no change on operation.
markings on mainboard:
BN97-06531P 0151
BN94-06123R
found and ordered replacement on ebay https://www.ebay.com/itm/394077328633
for 54$
second house call:
with replacement mainboard, tv turns on, has sound,... -
Hello dear Badcappers,
I came across a PS5 that was longscrewed. The screw went through the HDMI IC (which I replaced + repaired the traces it damaged), however the screw also bend the board and slightly cracked it on the other side. It still seems like it could be fixable though as the area might not have lots of traces going through it (fingers crossed).
Can somebody, please, measure their board and tell me if my assumption of an inner short between the via and ground layer is correct? These 3 pads have almost no resistance. I would like to make sure those are not some data...07-27-2024, 08:54 AM -
Hi Folks
I'm looking for a extreme high current short killer solution for a reasonable cost.
I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
After taking off the socket, the shorts dissappear again.
The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...10-15-2024, 10:13 AM -
Hi there,
I discovered this forum through a youtuber who teaches electronic repair. I've been trying to troubleshoot my dad's old PC which is a Gigabyte GA-H61M-USB3-B3 and will not power on. I discovered a dead short on the 3.3v rail at the ATX connector so I used a bench power supply to feed 3.3v into the ATX connector and sunk about 400mA into the board (I hope that's not too much!). I used a FLIR camera to identify the problem area:
The chip seems to be the following, an ITE IT8892E 1108-CXS which seems to be a PCI bridge?
...
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