I'm having a problem with my son's Dell computer. Sporadically nothing happens when the power button is pushed for startup. This first happened after we installed more RAM. Ram chips were matching Dell 524K pair taken from my computer. The unit wouldn't boot up when I pressed the power button. Then suddenly it did boot up and worked fine for a month. Then again nothing. I took it apart and checked out the power switch, got online with Dell tech support. They eventually thought it might be corrosion on a usb port but we were unable to confirm because in the middle of investigating the unit started working. I replaced the USB cable anyway. Now the problem is reoccuring randomly. Any thoughts?
