Chapter 4. Troubleshooting And Diagnostics; Basic Troubleshooting - Lenovo ThinkCentre A35 Quick Reference Manual
(english) quick reference for thinkcentre a35 (type 8139)
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Chapter 4. Troubleshooting and diagnostics
This chapter describes some basic troubleshooting and diagnostic tools. If your
computer problem is not described here, use Access IBM for more detailed
troubleshooting information.
Basic troubleshooting
Symptom
The computer does not
start when you press the
power button.
The monitor screen is
blank.
© Copyright Lenovo 2005. © Portions Copyright IBM Corp. 2005.
Action
Verify that:
v The power cord is plugged into the rear of the computer
and into a working electrical outlet.
v If your computer has a secondary power switch on the
back of the computer, ensure that it is switched on. Check
the power indicator on the front of the computer to ensure
that the power is on.
v The voltage switch on the power supply is set correctly
(115 or 230).
If you cannot correct the problem, have the computer
serviced.
Verify that:
v The monitor cable is securely attached to the rear of the
monitor and to the rear of the computer.
v The monitor power cord is plugged into the monitor and
into a working electrical outlet.
v The monitor is turned on, and the brightness and contrast
controls are set correctly.
v The monitor signal cable is securely connected to the
monitor and to the monitor connector on the computer.
Note: If your computer has two monitor connectors, verify
that your monitor is connected to the one in the accelerated
graphics port (AGP) option slot rather than the one in the
rear of the system board. See Step 4 on page 3.
If you cannot correct the problem, have the computer
serviced.
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