Called GDI on a Friday at 4:30pm before a three day weekend and Jim came by my office on his way home to help troubleshoot my computer. I thought the computer was blown, due to the puff of smoke before it went black. Within minutes Jim found that my graphics card had shorted out making it seem like the motherboard had blown. I was ready to buy a new computer but luckily called GDI and found it was a $ 40 fix. Outstanding service and very knowledgeable