My XP computer wont connect to my flatscreen

Hey there, i have an old computer and a new flatscreen, the flatscreen has hdmi and usb and nothing else, so i use a VDI stick for my computer and it converts into a HDMI, it works when i start up the computer, then when i need to type the password for my computer it doesent work anymore and just says "No signal" i dont know what to do.

Are you sure it only had HDMI? Bit odd, most would have a second DVI or VGA connection.

You can get a pretty cheap video card that has HDMI, but need to know the brand and model of the PC to figure out which will fit.