I have an old Optiplex 790 SFF that crashed and I have no clue what the matter is. The power light is solid amber, error codes 2, 3 & 4 are flashing, keyboard, mouse and monitor do not work. I thought the issue was with the BIOS but I can't install, assuming thats the problem to begin with. HELP!!
That suggests a motherboard failure.
Dell forum member since 2002
Dell Inspiron 15 - 5577 Laptop
Home Built Desktop PC with ASUS ROG Z170, i7 6700K CPU
Windows 10 64 bit Pro and Windows 10 Insider Program Beta Versions. SSD drives. Cakewalk by BandLab and Studio One 4.1 Recordng Studio Software.
Dell S2719dgf Monitor
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You can get a working system for very little.
You have a bad power supply and fried motherboard.