Netvista pc would not start

The 3 beeps is an error code. If not in your Dell manual contact their customer service tech department to find out what the beeps refer to and then you be guided accordingly with your repair. Could be a bad peripheral, faulty power supply signal, etc.

Try unlocking sites

By your description seems that the power supply does not have the enough power that the system requires. Get a bigger Wattage power supply.

An old IBM computer that has been stripped and junked only to be dragged in by your grandson to be junked again. Threy haven't made an IBM Netvista in a long time, long enough that IBM sold off the division to the Chinese and is now known as Lenova. The Netvista's had a bad rep as they came with defective capacitors that eventually bulged and leaked

make sure bios clear jumper on motherboard is onright

The part in question is called an encoder. I have had to replace this part on a number of Aiwa units. If you can post the model number off of the back, I''ll get you the part number.

Dan

"the computer does not turn off"

So something started up? Fan? Hard drive?

The internet cable fed to your modem by your ISP if faulty.

You have probably permanently damaged your turntable. The voltage supply in Germany is 220V AC, whereas in the US it is 110 V AC. It is just possible that all you have done is to blow a fuse in the unit, if no external fuse holders are visible then try opening up the case and looking for one near where the power cable enters the unit. If you have no luck with that then the transformer is almost certainly burnt out - this could be replaced but it is unlikely to be something you can do yourself. Please don't plug anything else that is designed for 110V into a European socket, regardless of being able to get an adaptor that will fit the socket - the voltage is different. It will almost certainly die as well and the possible risks of electric shock, fire etc. are quite significant. Hope this helps, if you want to try and get the unit repaired in Germany please ask again with details of your location and I will try and find you a reputable repair facility. If in doubt about which of your items can be plugged in in Europe then please ask as some can be switched to deal with the higher voltage, although not all. :)