BIOS signals. List of held processors, BIOS update

[Renal14]

I ask for help.
There is a system unit "HP ProDesk 600 G1 Small Form Factor".

The system unit configuration has changed:
CPU - Celeron g1640
RAM - 2Gb Samsung.

There is a problem when supplying power to the PSU, while the battle is heard the BIOS signal (two long beeps).
Without a CPU (or 4p power supply of a CPU), the number of beeps is more than 3-4.
I tried with other RAM slots - anyway, 2 beeps.
The battery shows exactly 3 volts. I can’t answer for the processor.

1) Could the g1840 CPU be not compatible with a 600 G1 motherboard? (I read on the net that there are HP computers that can only work with ATI Radeon 7000 series).
2) Please give a link to a list of compatible processors.
3) Where can I connect a POST card (there is a PSI x1 and a LPC port of 2 pcs.)
4) Is it possible to update BIOS without booting? Will this help?

Translated - Google

[Paul_Tikkanen]

Hi:

Below is the link to the quickspecs for that model series.

I do not see the  G1840 listed as a supported processor...1820 and 1830 only.

http://www.hp.com/hpinfo/newsroom/press_kits/2013/HPDiscoverBarcelona/ProDesk_600_G1_Desktop_Mini_Qu...

Below is the link to the service manual which has the beep code translation...chapter 9 starting on page 194.

http://h10032.www1.hp.com/ctg/Manual/c04331099

[Renal14]

Thank you for your informative answer. Judging by the documentation, I have a problem with determining the connection of the cooling system for the CPU. However, replacing the fan with 4 and 3 pin ones did not solve the problem. With any fan in the CPU fan 2 sound signals.

Is the CPU or motherboard to blame?
After applying voltage, 12 volts rise for 1 second on the CPU fan connector

[Paul_Tikkanen]

You're very welcome.

Unfortunately, I wouldn't know what the problem could be.

Since the  G1840 is not a supported processor, I would install the original one and see if the problem is resolved.

[Renal14]

Apparently you are right, even after the BIOS update with the 4570 processor (I assumed that the list of CPUID with the new Haswell would be updated) Nothing has changed ...

[Renal14 · Accepted solution]

After CPU installation: Pentium G 3250, which is missing from the list. The system unit turned on without any problems.