Bought an HP Paviliton Slimline s3750t in February - six weeks later the power supply died. No lights, no fan, nothing. Spent an hour online with HP chat support who promised to send a replacement within 3-4 business days. Nothing arrived so now I'm on the phone with HP support who have spent 20 minutes so far trying to see if there is any record. What is your experience with HP support and the quality of this product. So far, I am very underwhelmed.
Slimline = BBQ hot box. Heat is the number one killer of electronics (you can't jack up the voltage on HP board). I've seen quite a few dead PSUs in this forum. The replacement PSU may not last very long if subjected to the same environment. It's too late to return the PC for a refund, but you can still migrate the electronics to a larger case with better ventilation (Antec 300). The larger case will also allow you to use a more powerful/quiet powersupply. Cost of the PSU is around $30-$40 after rebate.