Recent company multiple client computer running 24 hour (long-term) (RHEL6.4 Linux operating system) has the stuck situation, the computer specific phenomenon is as follows:

1. The power lights normally on

2. Often drive lights

3. The display is not bright, the power lamp for yellow

4. The keyboard caps key can open closed

5. The mouse, keyboard won't light up display

6. Vncviewer unable to connect, the network can't ping

7. Kdump service configured, no crash file

8. Display power management has been set never sleep

Power after the restart, check/var/log/messages system log,/var/cron job log regularly (every 5 minutes, 10 minutes timing task), power from stuck to restart this period of time (more than 1 hour) without any print log,

Hope everybody Linux a great god, and if the analysis of some idea or method, can be glad, thank you very much your help!!!!!!