dash lights going on and off

i have a 93 jimmy and my digital spedometer goes off for days or weeks at a time, now my spedometer is back and all other lights are off, help!, the entire dash is digital

You need to go on ebay and pick up another dash computer to fix your problem.

Search for blazer digital dash

http://search-desc.ebay.com/blazer-digital-dash_Parts-Accessories_W0QQcatrefZC12QQcoactionZcompareQQcoen trypageZsearchQQcopagenumZ1QQfromZR10QQsacategoryZ 6028QQsosortorderZ1QQsosortpropertyZ1QQsotextsearc hedZ2QQsotrZ2

You need to go on ebay and pick up another dash computer to fix your problem.

Search for blazer digital dash

http://search-desc.ebay.com/blazer-digital-dash_Parts-Accessories_W0QQcatrefZC12QQcoactionZcompareQQcoen trypageZsearchQQcopagenumZ1QQfromZR10QQsacategoryZ 6028QQsosortorderZ1QQsosortpropertyZ1QQsotextsearc hedZ2QQsotrZ2
hi, i had the same problem,, my digital dash would all of a sudden fade out back in and out then in ,, then stayed on,, for about a week ,, went to town one morning it was fine came home shut truck off then later went back to town turned truck on no digital dash just odometer and speed .. not sure if its shot or a wiring problem, donna

Computer is shot, as said above, you need to buy a repaired replacement.