hidden short circuit

JorgeHernan

Member

Join Date: Apr 2006

Posts: 42
#1

hidden short circuit

05-20-2008, 08:07 AM

Hello guys
I have a pcchips 789 with a soldered via smauel c3.The only mosfet in the vrm blew so i desoldered that mosfet and replaced with a irfz44.The psu blew too.When i turned the motherboard on the irfz44 blew too so desoldered the surrounding schottky diode and capacitors and still get a shortcircuit across the capacitor pads.I can not tell where the short circuit is coming from.Thank you
Tags: None
Harvey

Badcaps Veteran

Join Date: Apr 2007

Posts: 264
#2

05-20-2008, 02:48 PM

Re: hidden short circuit

If the mosfet had shorted, its probably taken out the CPU too.
Comment
kc8adu

Super Moderator

Join Date: Nov 2003

Posts: 8832

Country: U.S.A!
#3

05-20-2008, 05:20 PM

Re: hidden short circuit

yep.
its toast.
toss in scrap pile.
Comment

Previous template Next

9th Gen Dell Optiplex Micro PC motherboard repair: Short Circuit?

by Geeker007

Hi All, I have a 9th Gen Dell Optiplex micro PC motherboard which doesn't power on. When I connect the motherboard with power adapter, it goes into safe mode and turns off. So from info I have gathered online, it looks like there is a short circuit on the motherboard. So can you guys help me with figuring out the issue?

I am new to electronics repair, so my queries could be naive but I am ready to learn.

So I have a multimeter and a solder with me. But I can try to get a variable voltage power supply with a thermal camera as well. From what I seen online, best way is...
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
01-28-2025, 03:31 PM
Nintendo Switch lite charging chip heats up and does not short circuit

by fab13

Hello everyone

Small technical problem on a Nintendo Switch lite
Here's what I noticed: the USB port has been damaged internally, with a short circuit on the power supply line to the small fuse.

After replacing the USB connector, the short circuit went away and I can't see any other short circuit in the whole motherboard.

When I charge the console, it seems to be charging: I get 15 volts and an amperage of 0.450 A.

Then, after a while, the amperage increases to 1.1 A and the BQ24193 charging chip starts to heat up, as evidenced...
- Channel: Troubleshooting Game Consoles & Other Weird Devices
09-16-2023, 04:59 AM
Short Circuit tester

by Tarot Superstars

Hello.
I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.

Link
The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
https://www.youtube.com/watch?v=0eixDdCpiO4

My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor...
- Channel: General Electronics Technical Discussion
09-25-2023, 09:11 AM
MSI B250 Gaming M3 Short circuit in CPU power supply circuit

by M1NEBLANK SHOW

Hello. MSI B250 Gaming M3 board, short-circuit on the power supply. Found a problematic mosfet VQ1
(N-PK616BA_PDFN8-HF) soldered it out - short circuit is gone. I replaced VQ1 + VQ5 (N-PK632BA_PDFN8-HF). VQ1 was replaced with PK618. After starting attempt VQ1 is lit again. What can be the problem? In the driver?

Schematic and Boardview here
...
- Channel: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
04-04-2025, 03:57 PM
Ceramic capacitors half short circuit or full short circuit?

by samtron786

Hello
two small ceramic capacitors with values 040. Can you tell me
whether they are half short circuit or full short circuit?

Thank you
- Channel: Troubleshooting TVs and Video Sources
01-07-2024, 05:20 AM
Loading...
No more items.

hidden short circuit

hidden short circuit

Comment

Comment

Related Topics