HP Integral Personal Computer Service Manual page 97

8-14 Troubl ....................... . .
,.... 1-1. 'ftIrn-On Probl ....
If the computer does not appear to come on when you tum on the power (if you see no display
activity within 20 seconds), follow the turn-on analysis' procedure in this table. Make sure that the
computer is set to the correct line voltage and
is
connected to an active electrical outlet.
The procedure assumes that no interfaces or memory modules are installed in the external I/O
ports.
An
interface can cause interrupt problems that
may
prevent the computer from turning on. H
you find that the computer will not turn on
with
an interface installed, but operates normally
without the interface, troubleshoot the interface.
Note:
The following procedure assumes that (initially) the operating system ROM is in-
stalled
in
the computer.
IS P'\MI
GOOD?
IS THEM DISC
DAIYE AND
"'INTER ACTIVITY
IS 'OWIA
S""'-Y OK?
~DOU
NOT lU'N ON
CCRIICTLY
...........
_-
NO
YERI'Y
~R
~Y
(TAILII ... 3J
NO
0011 COMPUTER
AlPLACE 'USE
TI.JI'N ON .. ITHCIUT
TME KEYtIOAAO?
YEI
TRCIUBLEa«XlT
THE DISPLAY
(TAIL!! .... ,
DOES COMPUTER
TUAN-ON
iliUM
.RYICE ROM?
NO
.... AIR
POICR
SUfIfIt. y
OISCOMECT
KI!Y.oAAD
NO
NMOYE O.S.ROM
I ... TALL
HAYICE ROM
"€1
REIlt.ACI!
O.S. ROM
. . PEAT TESTS
Flgur ....... Turn-On
Anal,s-.
Flow CIuIrt
YES
AEPLACE
ICEYIIQAIIIO
TAOUa.ESHOOT
NO
SYITD4 Cl.OCKS
lUlU '-131
AM)
IN'r!MUtT
CIACUJTRV
ITA8LI •• ,.)