Dangerous chinese power strip kills motherboard, is it fixable?
Hello.
Some time ago, we had an issue at the company that I work for.
Someone tried to move his stuff to a nearby desk and upon reconnecting power strip to mains there was a loud noise and some sparks.
Then the power breaker tripped.
Upon investigation, found that the ground wire was cut inside the power strip, so all the devices were running non grounded all this time and then, when the employee tried to move his computer, the floating ground wire came in contact with Live.
The following parts were dead after this:
1x Dell 24" Full HD monitor (that's where the flames came from)
1x expensive mechanical keyboard
and the motherboard of the computer got a hole on its HDMI IC.
The motherboard is Gigabyte GA-B85M-HD3 Rev 1.1
https://www.badcaps.net/forum/attach...1&d=1601940425
The HDMI IC with the hole in the center is PTN3360DBS.
https://www.badcaps.net/forum/attach...1&d=1601940425
The IC has been succesfully removed but motherboard still not working.
When connecting psu to mains, fan tries to spin then stops then retries then stops again, then gives up.
I checked with multimeter and found that it appears that 3.3V is shorted to ground and same goes for 12V.
On the contrary, checked 5V, 5Vsb and -12V and they seem to be ok.
My experience in troubleshooting mbs at this level is limited.
Do you think mobo is a goner?
Should I try to remove other components that might be shorted, hoping that at some point the mb wont appear shorted anymore and then I will have been able to spot what causes the short?
Some time ago, we had an issue at the company that I work for.
Someone tried to move his stuff to a nearby desk and upon reconnecting power strip to mains there was a loud noise and some sparks.
Then the power breaker tripped.
Upon investigation, found that the ground wire was cut inside the power strip, so all the devices were running non grounded all this time and then, when the employee tried to move his computer, the floating ground wire came in contact with Live.
The following parts were dead after this:
1x Dell 24" Full HD monitor (that's where the flames came from)
1x expensive mechanical keyboard
and the motherboard of the computer got a hole on its HDMI IC.
The motherboard is Gigabyte GA-B85M-HD3 Rev 1.1
https://www.badcaps.net/forum/attach...1&d=1601940425
The HDMI IC with the hole in the center is PTN3360DBS.
https://www.badcaps.net/forum/attach...1&d=1601940425
The IC has been succesfully removed but motherboard still not working.
When connecting psu to mains, fan tries to spin then stops then retries then stops again, then gives up.
I checked with multimeter and found that it appears that 3.3V is shorted to ground and same goes for 12V.
On the contrary, checked 5V, 5Vsb and -12V and they seem to be ok.
My experience in troubleshooting mbs at this level is limited.
Do you think mobo is a goner?
Should I try to remove other components that might be shorted, hoping that at some point the mb wont appear shorted anymore and then I will have been able to spot what causes the short?
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