Question about HP Scanjet 5490c Flatbed Scanner
HP Scanjet 5490c - I was scanning and the light stopped midway in the scan. Now the scanning light, the power light and the toggle light (b/w versus color) blink in unison. I have disconnected the power cord and the USB connection and reconnected them but nothing helps. I have rebooted my computer to try to trigger the lamp to move/reset but it doesn't work because the computer doesn't recognize that the scanner is attached. There is nothing on the LCD. I can't do a reset or anything because the scanner isn't recognized.
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Posted on Jan 02, 2017
Although I can not be sure without testing it, the most common problem with this type of issue is that the power supply adapter has failed. According to the manual (posted at http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00215714/c00215714.pdf) this scanner has an external power adapter. Since you indicate that the scanners light does not come on, I would be inclined to believe that power adapter needs to be replaced. However, before you go and buy a new one, I would suggest you get the current adapter tested with a volt meter to determine if it is outputting the correct voltage and amperage.
If you discover that the power adapter has failed, you may be able to simply replace it in order to get the scanner up and running again. However please take note that depending on what part of the adapter circuit failed, its failure could possible have also damaged the scanner's internal circuits. However, if you find after testing that the adapter is outputting the correct voltage and amperage, then the problem would most likely be a scanner board circuitry failure.
Posted on May 04, 2009
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