Well i just installed a new PSU to my Dell dimension B110 and the first time i started it up it worked just like normal so i turned it off. But then i accidently switched the 115V switch to 230V(While it was off) and it acted weird so i quickly pulled the plug and switched it back to 115V. I put the power plug back in and it started up automattically and started beeping. Im guessing the beeping is beep code for a problem it has but idk how to fix it. The CD drive and computer itself are on but you see nothing but black on the monitor and the keyboard and mouse dont respond to it. After thinking it was the power supply it switched it back to the old one and same exact problem. What do you suggest to get my computer working again! D: