We are a school with a HP network - 10 HP Compaq dc7900 computers, all identical. Few weeks ago when I started the job here I found 2 of 10 PCs not working. During the last week other 2 collapsed. All of them have the same symptoms.
The PC starts booting, the memory test runs and the screen shows:
HP Compaq dc7900 Convertible Minitower
<F9=Boot Menu> <F10=Setup> <F12=Network>
The keyboad responds within the first few seconds after that screen of hang appears (2 or 3 seconds) and pressing F9 or F10 triggers the option but leads nowhere (still hangs) - then the PC freezes. The same thing happens if I just wait without pressing any key – PC freezes.
I checked the cables, the HDD, the memory. I replaced the battery and cleared the CMOS. The problem is that I cannot reach BIOS or read any CD/USB flash drive. I read about a similar issue on the net, with no follow-up, unfortunately.
Please – help needed !