Please Help me. I've been using my desktop computer for some time now, until yesterday I couldn't turn it on. whenever I press the power button, instead of it to come on, it only shows a light beside the power light. so I thought of may be the voltage isn't enough because I use it with a small generator in school. I increased the current/voltage it still didn't come up, so forgetting that I have increased. the current/votage, I toggled a switch behind the CPU from 230 to 110 and something exploded inside. I returned it back to 230, it didn't affect the working condition of the generator but doesn't come on, I switched it to 110, it affects the generator's working condition which shows a component has burnt or spoiled. what could be the problem, and what should I do?

I guess You just blew up the power pack, you need to get it replaced, and i hope it didnt affect the motherboard.

Initially why it is not coming up is likely to be caused by a bad RAM.

Whoops. Prepare your 6 - 8K NGN for replacement of your power pack. If it didn't come on then it was likely a bad motherboard to begin with. If it came on and there were two beeps with a blank screen then it was bad RAM chips.
I miss the days of opening desktop PCs and playing around inside. I can't try it with laptops because of their delicate parts.