so my tv is super-old (10+ years) and recently i've noticed that when i turn it on, it takes several minutes for anything to appear on the screen. the screen just stays black as if it's turned off but you can hear whatever is on. also, when i change the channel, it'll become black for a few seconds and then the images will appear.

i don't really want to buy a new tv yet if it'll be cheaper to fix this one - can't afford those four-figure flat screens. any suggestions???

thanks!