× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Sun 450 not working
Posted to Tool & Equipment Forum on 3/14/2017

Hay Jim, Sorry for all of your problems.I know it is very hard to focus when the S%%t hits the fan & the wheels stop turning.I sincerely hope everything straightens out for you.And no problem for unloading.Sometimes we all need to do that & hopefully it made you feel better.Anyway for repairing my Sun-500.I ended up replacing the processor & Slot 1 board.Actually how I found the problem was that not long after I purchased the unit I upgraded the 333 MHz processor with a 433 MHz one & changer the slot 1 board because I just wanted to keep the original one intact so I changed both.After many years of trouble free use the unit would not boot at times.Not even go into the dos power up screen.After E-mailing the builders of the unit,in this case "Granite Micro-systems" to no avail because they never answered me...That really upsets me when a company can't even E-mail you back...I decided to totally disassemble the computer & check everything including the power supply.After finding nothing there I found a web sight that explained how to power up the power supply & check all outputs.That checked OK so problem was in main part or computer.I decided to just reinstall the original 333 processor & board after finding nothing else for the hell of it & wa-la up she went.After that I decided to get another processor & slot 1 board.I actually upgraded the processor to a 633 MHz celeron which worked perfectly.I am now in the process of upgrading the RAM.Just waiting for a couple of new chips.I got the processor from E-bay.Spent $7.00 inc.shipping USED. Worked flawlessly.The slot 1 board from on E-bay for $13.00 new.This was all it took to get the unit up & running again.If you have any more questions about what I did just either E-mail me or call.I will try to help you out as much as I can when you are ready.

Arthur Margotta
AJ.'s Ultralights, Automotive & Sport Vehicles
Thompson, Pennsylvania, USA