I have the above computer with an i3-2125 CPU, Windows 7 Home Premium 64 bit, and a 300GB Seagate Hard drive. I've had it for about 2 years and been working fine. It started acting up about 2 months ago. It would lose the date and time. I checked the battery, and it was OK, so I kept using the computer. Then on 9/15/2014 it hung on "Starting Windows", I did the following:
1. Ran the built in HP diagnostic on hard drive and memory and they both passed.
2. Tried to go to last known good configuration and nothing happened.
3. Noticed the date and time were off, replaced the battery, nothing changed.
4. Tried another hard drive from another HP PRO 3400 Series and it would boot up but could not set date in bios.
5. Tried all kinds of things but could not set date in bios.
a. Bios date read 48/00/0048 after removing and replacing battery.
b, Tried to reset date to 9/16/2914 and it gets 56/00/0051
6. Then it wouldn't boot at all. So now when you turn on the power, the CPU fan starts and runs for about 1 second, then shuts off for 4 seconds, then starts and runs for another 1 sec and it does this continuously. There is no video and no beeps and no difference when all memory is removed.
7. I removed the power supply, and checked voltages. It appears to be OK.
8. I removed the motherboard, and inspected it- saw nothing obvious.
9. I connected the power supply to the motherboard with nothing else connected to the motherboard, and I get the same thing. CPU fan starts then stops continuously, no video no beeps. I connected another power supply, and got the same thing.
10. I am thinking it is the Motherboard or CPU, but I sure could use some suggestions as to what to do next.
Thanks
Maxgle from CA