Common Troubleshooting - Hisense HK950 Service Manual

Remove all the peripheral components and host hardware remaining power supply、Mainboard、cpu these three
components， plug in and observe if it works normally, if there is no faults we can install other parts step by step until
the whole machine cannot work normally, find out the error part and repair it.
5）heating and cooling method
Use finger to touch the heating part and observe if there is overheating; cool the abnormally heating part with an
absorbent cotton swab containing absolute ethanol, if the failure eliminates, it can proves that the failure is caused by
the overheating stability.

4.4 Common Troubleshooting

1）common error message tips and solutions when the boot
Error prompt
BIOS ROM checksum error:
System halted
CMOS battery failed or
CMOS battery state low
CMOS checksum
error-Defaults loaded
CMOS System Options Not
Set
Press F1 to continue Del to
setup
Memory Test Fail
Keyboard Error
Hard disk Install Failure
HDD controller Failure
Hard disk(s) diagnosis fail
Primary master hard disk fail
C drive error
Override enable-defaults
Cause
BIOS ROM program data has
been changed or BIOS chip is
damaged
CMOS battery power shortage
CMOS battery power shortage,
or may be caused by CIH virus
problems
The data stored in the CMOS is
corrupted or does not exist
BIOS settings problems, it may
be a hardware installation
problems, such as hard disk
installation is not correct
Memory installation is not
strong or damaged, it may not
memory compatibility, or BIOS
and memory-related settings are
not appropriate, such as memory
frequency and actual value does
not match
Keyboard damage or poor
connection status
HDD port bad connection or
HDD damaged
HDD port not good
HDD damaged
HDD fault
The BIOS does not receive a
signal from the hard disk C
BIOS settings are not suitable
HK950 Service Manual
Solution
1) Restart the computer into the BIOS and load
the default settings
2) Remove the CMOS battery for about 10
seconds, discharge the CMOS, and then enter
the BIOS to load the default settings
Replace a new CMOS battery
1) enter into the BIOS to load the default
settings, 2) for the CMOS battery discharge, and
then load the BIOS default settings, 3) try
another CMOS battery
Load BIOS default settings
1) load the BIOS default settings; 2) or check
the hardware whether has problem
1) first load the BIOS default settings try, 2)
re-insert the memory or replace the new
memory to try
Check whether the keyboard is plugged well or
the keyboard interface is good
Check whether the hard disk interface is
connected properly, replace the new hard drive
to test
Check whether the hard disk interface is
connected properly
Connect the hard disk to another device to
check for proper operation
1) Load the BIOS default settings to try
2) Check the hard disk interface status is good
1) Check the hard disk interface is correct
2) load the BIOS default settings to try
1) Load the BIOS default settings to try