T r o u b l e s h o o t i n g
LS/VS 550 OWNER’S HANDBOOK 6/3
by a POST error message, call your supplier or authorised
maintainer.
No beeps
If no beeps are heard at all the speaker may
be disconnected or there may be a speaker
circuitry fault.
One short beep
Marks the completion of POST and no
functional errors found. You will also get a
single beep if you press an invalid key for a
power-on password.
Two short beeps
Indicates and draws your attention to an
error during POST. This should be
accompanied by an error message.
Three short beeps
. System memory error, normally
accompanied by code 201. Beeps are used
when the video cannot display the code.
Continuous beep
Could indicate a serious failure of the system
motherboard, or a failure of the speaker
circuitry.
Repeating short
beeps
Usually indicative of a keyboard key stuck
down, but may be due to the keyboard
interface failing.
One long and one
short beep
POST has detected an error on the video
adapter in the system. There may be no
display on the screen.
One long and two
short beeps
This means that either the video system is
faulty, or that a video I/O adapter ROM is
not readable.
Two long and two
short beeps
The video subsystem cannot be supported
by the main system POST. This can occur
when the video subsystem is replaced or
changed on site.