What is a parallel loopback plug? It was mentioned on page 1002 symptom 31-4 of the millenium edition - Troubleshooting, Maintaining & Repairing PCs by S. Bigelow. Does anyone has tried to use the included diagnostic CD?
hammerhead
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A loopback plug is a simple piece of hardware.
It enables software to test the physical integrity of the parallel port. The program sends information to the data-out pins which is then 'looped-back' to the data-in pins.
The program checks the information sent out against what it receives back. If identical, the parallel port is good.
It enables software to test the physical integrity of the parallel port. The program sends information to the data-out pins which is then 'looped-back' to the data-in pins.
The program checks the information sent out against what it receives back. If identical, the parallel port is good.
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