Enthusiast digs into CPU substrate for surgery to replace ripped-off data pin — resurrected chip boots and hits 33% overclock

Enthusiast digs into CPU substrate for surgery to replace ripped-off data pin — resurrected chip boots and hits 33% overclock

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Watch On As the Celeron 1200’s missing pin was a data pin (D47), this was a definite fix-or-be-damned situation. Sometimes CPUs can have a pin or two missing, and they will work anyway. I’ve seen CPUs shrug off such missing connections when several remaining pins duplicate a function – power or ground pins, for example.

Bits und Bolts started the repair process with a close-up of the serious-looking damage. Then we see the missing pin area after they have apparently “dug a hole” so that the work/issue can be seen more clearly. Zoomed-in images show that there were several layers of copper exposed from under the green surface. The new pin must be connected solely to the central circular area you can see, and not accidentally connect with any of the copper planes surrounding it. Thus, the TechTuber started by applying solder mask to this area. Remember, these pins are very small, and it would have been an intricate job to mask the surrounding area solidly yet cleanly.

While the solder mask surrounding the Intel Celeron 1200’s vacant pin cured, Bits und Bolts harvested a few pins from another Tualatin chip that was “definitely broken.” Returning to the CPU under repair, it was time to add flux, then try to ‘tin’ the central circular copper area to which the donor pin would be soldered.

Soldering the donor pin went smoothly, leaving it perfectly in position and upright. You can definitely see which pin has been added by Bits und Bolts, but after nervously adding the repaired Celeron 1200 to a socket, the TechTuber was relieved that everything mated cleanly.

Owner of original Intel 8080 pre-production layout seeks restorer

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