How to connect PS3 to an old LCD monitor

1. Monitor must have HDMI input (best) or DVI (low, connects to the console via an adapter). D-Sub input is not suitable
2. The monitor must support HDCP (otherwise nothing will show).

If the first item on the old monitor can go, the chances of the second are close to zero.

che cord VGА on PS3 does not exist??

no

very bad, very!

and adapter HDMI - to - DVI padget though?

Yes, I have and connected. And the standard cable that comes with, throw the sound to the speakers.
See for yourself what you want, but I would recommend to find an adapter hdmi male - dvi mother. Stick it in a PS3 and forget. And when you need to pull the cable out of the computer and plugging into the PS3. To the back of the monitor in General, not to climb. Costs 400-500 rubles

actually the PS3 has both digital and analog output
and the bundled cord

but the nest, please do not confuse with HDMI

thus even old TV can be connected

there is an adapter HDMI-to-VGA for older monitors where there is no HDCP, i.e. no HDMI and DVI connectors, only VGA. costs from 500 to 1000.