Appendix
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EC7-1818CLD2NA
low-speed
connector.
HISPEED in USB device option.
Analysis: it could result from improper operation when
inserting or removing the memory and cause abnormal
operation of the components on the motherboard. Focus
on the circuit related to the memory on the motherboard.
4
The screen has
no display after
replacing with a
new memory
and cannot enter
system; even
when the former
memory is
re-installed, the
system cannot
be booted as
well.
Solution: check the hardware such as memory, video card
first; if it shows that the hardware are all OK, then check
the circuit around the memory slot on motherboard
carefully; you may find that the two pins connected with
the gold finger in the first memory slot are shorted while
the second memory slot is normal, then you may know
that there is short circuit in the first memory slot. Remove
the two pins to their original location with tweezers
carefully, insert the memory, reboot the system and the
system will be booted smoothly.
Analysis: the data cable of the hard disk may get knocked
when installing the CD-ROM, which leads to poor
connection of the hard disk data cable, or the master and
slave jumpers on hard disk and CD-ROM are wrongly
set.
5
The system
cannot be
booted after
replacing a
CD-ROM.
Solution: check the data cable of the hard disk and the
IDE connectors on hard disk and motherboard first; if
there are no problems, then check the master and slave
jumper setting. You may find that the hard disk and
CD-ROM are connected with different data cables while
their jumpers are all set to master; thus, the hard disk
cannot be booted. Set the CD-ROM jumper to slave and
then re-install it.
Analysis: make sure the PCI card functions normally;
re-insert the PCI card or insert it into another PCI slot to
see whether it is normal; find out the power type in use
(AT or ATX); find out users’ requirement for the PCI card
voltage.
6
No PCI card can
be detected after
entering the
system.
Solution: if the PCI card functions abnormally, replace it
with a new one; if it functions normally when re-inserted
or inserted in another PCI slot, then there is something
wrong between the PCI card and the slot. If AT power is
adopted and the PCI card requires 3.3V voltage, then the
