I have already test ttyb and there was nothing at all (with and without ALOM card) that the problem is!
I connected to ttyb with similar setting as to alom serial managm. port and there was nothing echoed. There was EMPTY screen in my tip connection.

Access to ALOM is never needed simply to get an OK prompt. We have systems that have been used for years without ALOM ever being used. The only thing that can keep you from an OK prompt is to have security-mode mode set in OBP and ALOM won't help you with that.

A one thing takes from another. The main problem is how to get access to an OK prompt!
I can't get OK and whant to get ALOM to diag problem and resolve it.
When OBP in secure-mode a password promt display is't it? But I have nothing on display (pushing Enter many times) axcept ALOM welcome( when I push #.)
How can I reset OBP to default?
Do not offer to replace motherboard

Let ALOM timeout and return to OBP. Getting nothing when press return indicates that ALOM has dropped off. Now you need to send a BREAK signal. I don't use tip, but the man page says ~# should do it. Those two characters probably need to be the first on a line, so type them after a return. If this doesn't work, your box may be broken. ALOM is independent of the rest of the system. It will even work with the power turned off. If your box is broken, there is no ALOM command to fix it. Replacing hardware will be the only way to get it working.

It sounds like you may have a cabling or flow control problem.

Configure your terminal or terminal emulator for no flow control;
if you don't get a timeout message within a few minutes after the RSC boots, and there is no response to sending newlines, try enabling hardware flow control.

Also, at the risk of stating the obvious - if you have the serial console connected when power is applied to the chassis, you will see the RSC boot dialogue on your console - but depending on how the RSC is configured, the system itself may not power on, and you then will, of course, get no response on the console. Once the RSC boot is complete, press the power button on the front...

*****TAKE NOTE OF POINT 3******* IMPT

Recovering TX000 ALOM Passwords

For security reasons, this procedure is available only while accessing the system
directly through the serial port. The procedure resets all ALOM NVRAM settings.

To Recover Your ALOM Passwords:

1. Connect to the ALOM serial port.
2. Power down the Sun Fire T2000 Server.

Remove the power cords from both power supplies. Wait several seconds for power
to discharge before reinserting the cords.

3. Press the Escape key during ALOM boot when the following text is displayed on
the console:

Boot Sector FLASH CRC Test
Boot Sector FLASH CRC Test, PASSED.


Return to Boot Monitor for Handshake

After pressing the Escape key, the ALOM boot escape menu is printed:

ALOM Menu

e - Erase ALOM NVRAM.
m - Run POST Menu.
R - Reset ALOM.
r - Return to bootmon.
Your selection:

4. Enter e to erase the ALOM NVRAM.

Your selection: e
ALOM NVRAM erased.

ALOM Menu

e - Erase ALOM NVRAM.
m - Run POST Menu.
R - Reset ALOM.
r - Return to bootmon.
Your selection:


5. Enter r to return to the ALOM boot process.

Your selection: r

ALOM POST 1.0
Status = 00007fff


ALOM then boots and resets all NVRAM settings. You are automatically logged on
as user admin with no password and no permissions. All ALOM NVRAM settings
are reset to the factory defaults.