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Thread: Anyone ever tried pin repair on a CPU?

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    ALT0153™ Rob_B's Avatar
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    Anyone ever tried pin repair on a CPU?

    I took a punt on a Ryzen chip with a broken pin (I think it's USB_HSD1P) and wondered if anyone had ever tried a repair? I'm fairly certain the CPU won't work as-is so I'm going in to this with eyes wide open, I've got an A320 mobo to test anything with before putting in my main rig.

    There are 2 options I've seen:
    - Drop a loose pin in the socket and put the CPU on top
    - Solder a pin from another CPU

    Since my soldering skills don't really exist the first option seems simple but I imagine pretty risky. Can I do the 2nd option with a heat gun maybe?

    Wish me luck!

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    Re: Anyone ever tried pin repair on a CPU?

    I'd be tempted to try the chip without the pin to start with, I had a guy buy a motherboard & CPU off me a while back, he brought it back and said that the iGPU didn't work, took his heatsink off and could see that what looked like a couple of bent pins on the socket, straightened them out and all was well, but other than the iGPU not working everything else tested fine so you might find that things work even without that single pin..

    However, if it is a USB one you might find some pretty important stuff doesn't work...

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    Re: Anyone ever tried pin repair on a CPU?

    Quote Originally Posted by [GSV]Trig View Post
    .... However, if it is a USB one you might find some pretty important stuff doesn't work...
    Any ideas on what that pin could do? I've tried to find out but can't find anything online

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    Re: Anyone ever tried pin repair on a CPU?

    Quote Originally Posted by Rob_B View Post
    Any ideas on what that pin could do? I've tried to find out but can't find anything online
    Purely based on this diagram linked, it connects to "USB to I2C"
    https://www.xwfix.com/wp-content/upl...ire_E5_722.pdf

    Then this is the best I could find as to what I2C does
    The I2C-USB bridge is connected to the PC in the same way as an HID device and requires no additional driver when connected to a PC installed with Windows®. This I2C-USB bridge works as a master in the I2C bus and is controlled by a PC program via the USB.
    https://www.infineon.com/dgdl/Infine...7d0eee3d4a7cea

    To me seems fundemental but I could be down completely the wrong rabbit hole

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    Re: Anyone ever tried pin repair on a CPU?

    I'm not going to pretend to understand those diagrams

    Looks like I might be learning how to do micro soldering!

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    Re: Anyone ever tried pin repair on a CPU?

    Can you photograph the chip, or at least confirm it’s number.
    Issue with soldering something that small, if you overheat you’ll fraggle the whole chip..

    Have you tried to run the chip yet?

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    Re: Anyone ever tried pin repair on a CPU?

    I've not got it yet, but will do

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    Re: Anyone ever tried pin repair on a CPU?

    Quote Originally Posted by AGTDenton View Post
    Purely based on this diagram linked, it connects to "USB to I2C"
    https://www.xwfix.com/wp-content/upl...ire_E5_722.pdf
    If that block diagram is to believed, then that pin is for interfacing to a touch pad.
    I2C is used in all sorts of places like reading dram configuration from the dimms and configuring network PHYs, but I would give it a try and see what the PC can't find and hope you don't get a "no memory detected" beep.

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    Re: Anyone ever tried pin repair on a CPU?

    Micro-soldering isn't too bad once you get used to it, assuming you have a steady hand. The main issue is the equipment. You really need the correct tools for the job.
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

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    Re: Anyone ever tried pin repair on a CPU?

    So, with 0 skill,0 experience and a bog standard soldering iron it seems like this is going to go swimmingly!

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    Re: Anyone ever tried pin repair on a CPU?

    Quote Originally Posted by Rob_B View Post
    So, with 0 skill,0 experience and a bog standard soldering iron it seems like this is going to go swimmingly!
    Please post the results

    I personally wouldn't be trying with a soldering iron (you need hot air), but as long as you're happy to write it off, have fun and learn!
    Quote Originally Posted by Saracen View Post
    And by trying to force me to like small pants, they've alienated me.

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    Re: Anyone ever tried pin repair on a CPU?

    I've got a heat gun, wasn't sure if that'd be enough but I can experiment!

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    ALT0153™ Rob_B's Avatar
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    Re: Anyone ever tried pin repair on a CPU?

    Well, got it this morning and after straightening a few surrounding pins I popped it into my rig and.... Drumroll please....!

    It seems totally fine!

    It boots to Windows fine, nothing seems to be broken (yet)
    Setting up RAM etc in the BIOS now and will check all the USB ports due to the naming of that pin, if OK then it looks like I snagged a 5600x for £65, I'm due some good luck finally!

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    Re: Anyone ever tried pin repair on a CPU?

    Told ya
    Can you see stuff not working in device manager?

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    ALT0153™ Rob_B's Avatar
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    Re: Anyone ever tried pin repair on a CPU?

    Nah, all looks good. Running cinebench now, boost clocks with PBO seem pretty good, temps are ok considering the cooling, I'm pleasnatly surprised as I'm pretty confident it wasnt just a ground pin

    10min run of R23...
    70C max
    Cores boosting to 4.5/4.6 (one is 4550 and the other five are 4650)
    Last edited by Rob_B; 08-08-2022 at 12:42 PM.

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    Re: Anyone ever tried pin repair on a CPU?

    Wow, that's a hell of a saving. Looking on ebay, used ones (without missing pins!) are going for north of £150. For £65 it was worth a punt, glad it seems to have paid off for you

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