Member Avatar for Man_1

Hello, just wanna try my luck if you can help me, i got my new ps/2 keyboard just a week ago
ill cut right to the chase, so this week my keyboard is automatically backspacing for no reason, so i tried opening my keyboard.. blow some dust,cleaned... then plugged now it gets worse ,some keys are responsive some dosent type, nor type wrong letters, literally nothing is showing up... I dont want to buy a new one cause lol, its just a week ago since i bought it..

P.S. typed with on screen keyboard, and yes i might voided my warranty..
win7 ult

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Quick diagnostic notes and practical checks for PS/2 keyboards with intermittent keys or unexpected backspacing.

Start by isolating hardware from software: test the keyboard before Windows loads (use the BIOS/POST screen or boot menu). If the same keys misbehave in BIOS, the fault is almost certainly the keyboard (switches, membrane, cable, or the PS/2 plug). If keys work in BIOS but fail in Windows, check input settings and drivers: confirm the keyboard layout/language, ensure Filter Keys/Sticky Keys are off (Control Panel -> Ease of Access), and uninstall the keyboard from Device Manager so Windows redetects it on reboot.

Hardware-focused checks that add useful detail beyond a simple visual inspection: inspect the PS/2 plug and motherboard port for bent or corroded pins; follow the cable to the PCB and look for wire breaks at the strain relief; for membrane keyboards look for torn traces between membrane layers; for mechanical keyboards remove keycaps and test individual switches. A basic continuity check with a multimeter across the cable wires can reveal intermittent breaks. Automatic backspace usually means the Backspace circuit is shorted or the controller is interpreting a stuck scancode — that points to internal damage rather than software.

Cleaning and repair notes: compressed air and 90% isopropyl alcohol are safe for removing dust and grime; avoid water. If the keyboard has been opened and the warranty voided, delicate membrane reseating or replacing faulty switches are options but often take more time and cost than a replacement. Cheap PS/2 units are more likely to fail; as observed, replacement is often the pragmatic choice. Also keep ’s reminder in mind: PS/2 is not hot-pluggable — always power down before connecting or disconnecting a PS/2 keyboard to avoid further damage.

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Member Avatar for rproffitt

Is this the famous? 2 USD keyboard? My thought is you need to take it as a lesson about cheap things and try another keyboard.

Member Avatar for Popc0rn

Just saying this out of necessity, sorry if you knew this already. Whenever you are connecting or disconnecting a PS/2 keyboard you need to turn off the computer first.

Check the pins in the keyboard connector, do they all look straight and undamaged?

Can you try it in a different computer? If so, are the same keys faulty?

If you are using a Windows operating system do you know how to uninstall the keyboard in devices or device manager? Uninstall the keyboard and then let Windows find it.

If none of the suggestions in this thread help can you return this keyboard?

Member Avatar for Man_1

OKay thanks for the advices guys, i ws able to return it.. so yes i hope ill learn from that thank you

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