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Conference wrksys::alphastation

Title:	Alpha Workstation Conference
Notice:	See note 1.* for conference notices
Moderator:	WRKSYS::HOUSE

Created:	Wed Sep 07 1994
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1996
Total number of notes:	9122

1953.0. "as255 power problem" by LATINA::MAS (MCS Madrid) Tue May 06 1997 15:55



	Hi all!!



	I have the next problem , with a AS255/300 with the
	next configuration:

	- AS255/300 (CPU rev C01) fw 6.1-2
	- 128Mb mem
	- CD-drive
	- Graphics adapter PBXGB-AA
	- KZPAA (with no devices atached)
	- Internal RZ28
	- Floppy drive
	- Mouse, keyb 
	- one TLZ07-VA and � RZ28M-va connected at internal SCSI
	  and in a BA356.


	Sometimes "only" when the customer switch off the system
	and switch power on again (waiting at least 40 sec).
	The led lits , the disk spin up the fan works but no video
	nothing else happens.


	The only "emergency" solution is the next

	Disconnect the CD,diskette drive and the internal disk
	Then switch on , and the system power up fine.
	At that time connect this three devices , and the power
	stay OK. Then i make a init instruction , the system 
	recognize the devices an then boots OK.


	I have replaced 2 power , the last one is revision C03
	The battery of the system board (it is said in note 1614)
	But all without results.


	May be a CPU problem?


	Any ideas?


	Thanks in advance


				Juan Antonio Mas

T.R Title User Personal
Name Date Lines

1953.1 Just Questions, No Answers... XDELTA::HOFFMAN Steve, OpenVMS Engineering Wed May 07 1997 12:12 12

T.R	Title	User	Personal Name	Date	Lines
1953.1	Just Questions, No Answers...	XDELTA::HOFFMAN	Steve, OpenVMS Engineering	`Wed May 07 1997 12:12`	12
	Is there a terminator in the KZPAA? How long is the internal SCSI? What are the SCSI IDs for the controller and for the various SCSI devices? Which operating system? I'd also use the internal SCSI for the internal devices, and the KZPAA for the external devices -- and I'd check for support of all devices on the SCSI chain, and for a sufficiently short SCSI bus. I'd also look at the BUS_PROBE_ALGORITHM, the BOOT_RESET variable, and the settings of the various other environment variables in the console.

   Is there a terminator in the KZPAA?  How long is the internal SCSI?
   What are the SCSI IDs for the controller and for the various SCSI
   devices?  Which operating system?

   I'd also use the internal SCSI for the internal devices, and the KZPAA
   for the external devices -- and I'd check for support of all devices
   on the SCSI chain, and for a sufficiently short SCSI bus.

   I'd also look at the BUS_PROBE_ALGORITHM, the BOOT_RESET variable, and
   the settings of the various other environment variables in the console.