GE MAC 800, Service Manual

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3-16 MAC™ 800 2031504-159D
Troubleshooting
4. Press any key on the USB keyboard and verify pass or fail:

If the character that appears in the Character Input field
matches the key you pressed, the test passed.

If the character does not match or no character appears in the
Character Input field, the test fails.
5. When the test is complete, press F6 to Cancel .
The following window opens.
6. Do one of the following:

If the test passed, press F4 to select Yes .

If the test failed, press F5 to select No .
Replace the mainboard assembly as described in “Replacing the
Mainboard Assembly” on page 4-16.
Patient Lead Wire Test
Test the patient leadwires as described in this section.
1. Open the Diagnostic Tests window as described in “Accessing the
System Diagnostics Function” on page 3-6.
2. Connect a patient cable with lead wires to the MAC 800 patient cable
connector.
3. Connect all leads to a patient simulator or shorting bar.
4. Select the Patient Lead Wire Check button.
The window shown below opens.