IBM W2H, 31x, 32x manual Problem determination, Preliminary checklist

11-9-2005

Chapter 3. Problem determination

Note: Refer to IBM Safety Information - Read This First, GA27-4004, before

beginning the procedures in this chapter.

Both software errors or hardware failures can cause problems with the 4810/4910

SurePOS 300. This chapter contains troubleshooting information to help you

determine the cause of a problem and how to solve it.

Preliminary checklist

Begin each service call by checking all of the items in this preliminary checklist. If,

after performing all the steps, a problem still exists, refer to Table 3-1to continue

problem determination.

1.Observe the power light. If it is not on, refer to Table 3-1.

2.Verify that the cables are securely and correctly connected.

3.Verify that the I/O devices, which have their own power switches, are connected to an ac power outlet that is operating correctly and that the devices are powered on.

4.Verify that the contrast and brightness controls on the video display (if attached) are set correctly.

5.Verify that all installed hardware devices (such as a memory module, feature card, printer, or mouse) are connected correctly and securely.

Table 3-1. 4810/4910 symptoms

Symptom	Actions
The power LED is off.	1.	Verify that the power cord is plugged into both the
		wall outlet and the back of the terminal.
	2.	Verify that the voltage switch setting is correct for
		your area.
	3.	Verify that the terminal is powered on.
	4.	Verify that there is power from the outlet.
	5.	Disconnect all attached devices and feature cards
		to determine if one is overloading the power
		supply. If the power light returns, reconnect them
		one at a time to determine the failing
		field-replaceable unit (FRU).
	6.	Ensure that all internal cabling and memory
		modules are correctly inserted.
	7.	Exchange the power supply.
	8.	Exchange the system board.
Terminal is not operating.	1.	Unplug the power outlet, wait 5 seconds, and then
		power ON. Verify that the power light on the front
		panel is on. Look for any error messages and
		listen for a beep at the completion of the POST.
	2.	Check for a blown fuse, a tripped circuit breaker,
		or a power failure.
	3.	Verify that all cables are securely connected to
		and inside of the terminal.
Power on, LED does not light.	Replace the LED assembly.

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