Old very slow laptop (Langley SL3)

It’s very temperamental, ever since my Scouts were doing a presentation with it, and tried to connect some external speakers. Who in their right mind makes the power supply for external speakers use a 3.5mm jack plug? It fried the headphone socket , and possibly other things inside as well. I’ve cleaned it of all the stuff I had on it and tried loading Ubuntu. It works, but incredibly slowwwwly. Like I try opening Firefox and five minutes later it opens. Basically I think it’s a heap of fertiliser but if someone wants to try to use it, feel free! Oh and the battery is dead, so wobble the power lead and it dies.