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Hi, Issues like this should be reported to Dell , if your system is still covered by a warranty then they can send a tech to further check it. Burnt smell can come from several parts of the system like power supply , motherboard , fan , etc. and it can be hazardous if not checked by a professional. What I suggest is that you call Dell technical Support. Hope this helps Thanks Dennis
Woops -the blinking amber light of doom is a common fault on dells - as you already have replaced the PS that leaves the motherboard. usually a solid amber is the PSU while a blinking one indicates MoBo problems. If either machine is still under warranty dell will replace it. If not then it will cost you to have them replaced.
FLASHING AMBER LIGHT FIX. This maybe in fact a motherboard issue, but actually its a bit more. You can and should replace the power supply with a more powerfull one as it will help overall, but the issue is Really the front USB ports and 2 issues concerning them, 1 some devices pluged into them have boot sequences of their own, (remember your boot seq goesfrom,USB,CD,ARRAY)etc. So if the device isnt design with its own OS, the mis-boot will get stuck Hence the Flashing light. and 2. the front USB ports dont supply alot of power upon bootup. and the devices pluged into them will again cause a mis-boot. Simply unplug everything from the FRONT usb ports. You may have to shut the computer off and unplug the machine for about *15* minutes. Enough to get the motherboard to downpower completely. with the front usb ports clear, and the power cord unpluged, hold down the power button and plug in the machine. should boot no problem. So to sum things up. The motherboard is fine, it just not happy with so many usb ports (power wise). A larger power supply is a good idea but wont entirly fix the issue, Unplug front usb devices as they may have some form of bootup.