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Weird reminder. When trying DIY skills on a 1990s computer, MAKE SURE TO UNPLUG YOUR PC first and plug in in last I accidentally fried ~3 computers with one single ps/2 keyboard, because I *assumed* plugging PS/2 keyboard in a turned off computer is no biggie. I was awfully wrong. Come to think of it, our beloved Lain not making such a mistake upon upgrading her computer shows her power level.

really? why does it do that? That's good to know, thanks lain

Could this just have been caused by static electricity buildup occurring during operating?

>>13361 I killed my big bro's PC back in 2000s this way. Dont remember why, but I reached the back panel of his computer from above and the purple ps/2 was in the way so i unplugged it and then plugged it back. Bro was blazing mad 1. It was NOT operating 2. I merely unplugged it and plugged back 3. ... >>13359 >3 computers this one and 2 diy projects bought with pocket money - should have bought a tiny laptop instead

>>13360 I don't really remember the details... IIRC, PS/2 has a direct access to CPU to the point in can interrupt the whole CPU to input its tiny bit of data. Well, some people tell its also about luck. And some fuses. Guess I had motherboards without ps/2 port fuses. https://www.reddit.com/r/techsupport/comments/a5ijiv/can_hotswapping_a_ps2_keyboard_fry_the_motherboard/

Feels good I'm not the unique in the 99 ... I fried my first pc because that , rip 486...

>>13368 Why has such an old tech never had a fix for this? Was it just that uncommon no one bothered to put in some kind of safegaurd? Or was there a fix built into the computers that does not exist anymore?

>>13415 >Or was there a fix built into the computers that does not exist anymore? The ps/2 port is obsolete itself anyway (retro tech only) see >>13368 link: the redditor's thread says there's often an a fuse to immediately cut the ps/2 port from the rest of the computer to allow resorting to a USB keyboard while keeping the PC intact

>>13417 It isnt really obsolete, it has some advantages to it along with it's setbacks. A fuse sounds like not the best fix because it would just help prevent damaging hardware not prevent a system crash.

>>13418 For the vast majority, USB polling speed would be near indistinguishable from PS/2's interrupts. There's niche benefits for PS/2 but there isn't a benefit for most modern end users.

>>13419 Probably but what in cases of using an old PS/2 keyboard? Does using an actual PS/2 port differ from using a PS/2 to USB adaptor?

>>13367 >>13359 >Bork entire PC Never had this happen. Check your building wiring perhaps? Might have other issues that cause residual current flow while plugged in and switched off. Leaky current boards were a cause of blown caps and other issues, which sounds like what you have. Even excess dust could cause shorts that allowed such problems to occur. In essence, there's probably a separate underlying cause - it's not normal for PS/2 socket. Also, PS/2 normally doesn't work after plugging back in as I recall. Need to restart the PC to detect the peripheral. It's not hot-swappable like USB.

>>13359 I mean there's a reason they switched to USB peripherals. There's no good reason in this day and age for the keyboard to have CPU priority and completely unrestricted access directly to the CPU anyways. That being said I know for older stuff sometimes it's not an option as PS/2 was the only input they had, Also thanks for this post, cause I had no idea that a keyboard could fry a mobo/cpu like that. Might have saved me some hassle down the line. There might be some sort of dongle you could get that's like a sort of PS/2 surge protector- idk... might be kind of hard to find these days.

>>13648 >There's no good reason in this day and age for the keyboard to have CPU priority and completely unrestricted access directly to the CPU anyways. I disagree. User input should ALWAYS be preemptive. This is a general design principle and isn't "day and age"-dependant

This has never happened to me and I've owned many pcs with ps2 ports