[CentOS] No text output in login console and shell

Hello,

I have a remote IBM x3550 M4 server that I try to remote control through 
IMM2. The problem: only the blinking cursor is visible in login console. 
It moves when I type. It moves to where "Login: _" should be if I press 
ctrl+c. I can login if I enter the correct login and password, but the 
shell that I get also shows only the blinking cursor and no text. I can 
issue commands.

The server is in production and works ok. SSH works ok. CentOS 6.

What I have tried:
- tty[1-7] with ctrl+alt+Fxxx
- 'reset' command after logging in
- initctl restart tty TTY=/dev/tty2
- killing ttyS

What I didn't try:
- reboot would mean downtime

Is there something that can be done about this?

More info:

# ps aux | grep tty
root     11631  0.0  0.0 103244   888 pts/0    S+   17:20   0:00 grep tty
root     15057  0.0  0.0   4064   564 tty3     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty3
root     15060  0.0  0.0   4064   568 tty4     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty4
root     15063  0.0  0.0   4064   572 tty5     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty5
root     15066  0.0  0.0   4064   564 tty6     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty6
root     18829  0.0  0.0   4064   568 tty1     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty1
root     29702  0.0  0.0   4064   568 tty2     Ss+  Feb18   0:00 
/sbin/mingetty /dev/tty2

# mount | grep pts
devpts on /dev/pts type devpts (rw,gid=5,mode=620)

Thank you
Ignas