[SOLVED] Intel CPU contacts stabbed by socket pins, contact pads condition not good; does this cause random Reboots ?

ssbaraskar99

Great
Oct 29, 2020
63
3
65
7
SYMPTOMS (from 2 weeks) :
  • My PC keeps rebooting randomly,
  • Sometimes it keeps turning ON-OFF & never even reaches POST (no BEEP)
  • OR Sometimes it comes to desktop (with in 20 - 60 secs) reboots,
  • OR Sometimes works completely fine as if nothing ever happened !
Now it just stays ON,
No BEEPs,
NO POST,
No Signal to Monitor & Keyboard + Mouse.

=====================================================================
TRIED THIS :
  • I cleaned RAM, contacts are completely fine no signs of rust/dust/color change, tried different slots -- still same
  • Cleaned CPU Contact Pads using eraser, then made sure no debris is present in its grooves, Used 99% Iso Propyl Alcohol to clean further, still those marks were not removed (check images in the folder link attached below) no capacitors were knocked out while cleaning. CPU was completely dry before inserting in Socket.
  • Checked BIOS Battery Voltage its, 3.1v ; still tried a new one still same symptoms,
  • Disconnected front panel, still same..
  • Re-applied Thermal Paste,
  • Tested PSU, voltages all good
  • BIOS was Reset, still same
  • Bare minimum hardware was connected still no POST, No Beeps, No Power/Signal to Monitor & Keyboard Mouse.
  • GPU tested works fine no overheating, Fans spin ! tried other display connection still same...
  • Motherboard has no signs of burnt chips,
  • When PC used to BOOT yesterday, i tried stress test for 5 hrs, CPU GPU RAM AIDA-64 didn't crashed, Max Temps CPU 75C GPU 80C still NO Crash,
  • NO Bent Socket PINS, were found. Checked for any debris nothing all clean.
  • All cables properly connected, still same
=====================================================================
WHAT I FOUND :
CPU CONTACT PADS were not looking in a good condition like they come from factory,
looks like CPU Contacts were stabbed by Socket PINs,
Here some images in the folder link below:
https://drive.google.com/drive/folders/1BSYFsIJPB_Jm2-iNt6r2bTho-F1PHqOS?usp=sharing
=====================================================================
SUSPICION:
  1. CPU
  2. Motherboard
=====================================================================
PC CONFIG:
Intel 9100F + STOCK Cooler -
purchased back in November 2020 together with Mobo.
ASUS EXB365M-V5 - purchased back in November 2020 with CPU
16GB KINGSTON 2133 MHz RAM
CORSAIR 750W PSU
120GB KINGSTON SATA SSD
2TB WD GREEN HDD

=====================================================================

Please provide some suggestions, for this weird behaviour
-- Thank you for helping me out...
 
its not liquid residue, its like burn marks. They are not getting off i used ISO Propyl Alcohol. Used Eraser to clean still not getting removed.
They would not become like that by themselves.
Obviously some corrosive liquid has been used (or something that leaves residue after drying up).

Technical grade isopropyl alcohol would not do that.
Probably some alcohol type liquid with non evaporating additives.

You can try toothpaste to remove corrosion residue. But be very careful. Don't let it go onto small surface mounted elements.
 
Reactions: ssbaraskar99

ssbaraskar99

Great
Oct 29, 2020
63
3
65
7
You have some kind of residue from a liquid on cpu contact pads. Possible signs of corrosion.
Clean it properly.
its not liquid residue, its like burn marks. They are not getting off i used ISO Propyl Alcohol. Used Eraser to clean still not getting removed.
That CPU is in HORRIBLE condition.

Where did you purchase this from?
it was new retail box sealed, at that time every contacts were proper now, they turned like this.
 
its not liquid residue, its like burn marks. They are not getting off i used ISO Propyl Alcohol. Used Eraser to clean still not getting removed.
They would not become like that by themselves.
Obviously some corrosive liquid has been used (or something that leaves residue after drying up).

Technical grade isopropyl alcohol would not do that.
Probably some alcohol type liquid with non evaporating additives.

You can try toothpaste to remove corrosion residue. But be very careful. Don't let it go onto small surface mounted elements.
 
Reactions: ssbaraskar99

ssbaraskar99

Great
Oct 29, 2020
63
3
65
7
They would not become like that by themselves.
Obviously some corrosive liquid has been used (or something that leaves residue after drying up).

Technical grade isopropyl alcohol would not do that.
Probably some alcohol type liquid with non evaporating additives.

You can try toothpaste to remove corrosion residue. But be very careful. Don't let it go onto small surface mounted elements.
Ok, I will try this.
Should I also try a Rust Removing spray ?
 

ssbaraskar99

Great
Oct 29, 2020
63
3
65
7
Not sure, how that would work on copper.

With toothpaste you can make copper contacts very shiny.
Use q-tips. Apply small amount of toothpaste and carefully scrape off corrosion residue.
I performed cleaning with toothpaste,
https://drive.google.com/file/d/1DDW4zoTOpSnJo96Bhs-3ERAelHQPZsQY/view?usp=sharing

This video shows its contact, they are a bit shiny but not corrosion free.
Properly cleaned it, dried.
Did this 3 times,
And soon I will test it.

I tested it, now it just turns ON,
NO POST, NO SIGNAL to monitor, keyboard,mouse.
I have a feeling, it's an DEAD CPU.

Still anything I can try ?😔


-- Thank you for providing me various tips...
 
Last edited:

ssbaraskar99

Great
Oct 29, 2020
63
3
65
7
I performed cleaning with toothpaste,
https://drive.google.com/file/d/1DDW4zoTOpSnJo96Bhs-3ERAelHQPZsQY/view?usp=sharing

This video shows its contact, they are a bit shiny but not corrosion free.
Properly cleaned it, dried.
Did this 3 times,
And soon I will test it.

I tested it, now it just turns ON,
NO POST, NO SIGNAL to monitor, keyboard,mouse.
I have a feeling, it's an DEAD CPU.

Still anything I can try ?😔


-- Thank you for providing me various tips...

+ UPDATE !!

I didn't got time after Oct 10, I left CPU installed in the motherboard.
& now it has started to work again, No CRASHES yet !
Super Weird ! o_Oo_O
 

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