Data in indicator flashing

It means the MYSTERY printer is collecting the data it needs to print. You need more memory in the printer or a faster network to fix it.

Try disconnecting the computer from the printer and shutting it down by removing the power cord and then also shut down the computer for a minute or so and then reboot it and check in "Printers" and see if it has anything waiting to be printed and if so clear out the queue. Flashing green light indicates that the printer is receiving data from the computer and/or printing so you shut it all down and cold reboot to clear out the computer confusion in both the computer and the printer.

the flashing amber status light is normal indicating data going from computer to printer.the flashing paper light indicates a paper jam or out of paper. A sensor maybe not working properly or sticking. If your model number ends in a D check

Sounds like a bad print job stuck in a print spooler.
Turn off copier. Go around to all computers that print to it and open the print queue. delete all print jobs. reboot each PC. Power up copier and see if it clears

The flashing green light means that the machine is receiving the print data that you are sending when trying to print. Depending on how the dealer set up the machine, yes it will shut down and stop printing when the "replace photconductor" indicator comes on. You will either need to order a replacement unit or have a local service guy come out and reset the counters. If you order your own unit, it will come with installation instructions and they are designed to be end user replaceable.
Good Luck and Thank You for using Fixya
WheatlandServices

The alarm light is flashing and the screen indicates read maintenance chapter in the user's guide.

Flashing light may indicate that it's receiving data to print.

What is it printing?

Cancel all print jobs.

These are following cases for this symptom.

If the access indicator flashes in green:

The data size of the image is large and it takes longer to process it for printing. Printing will start as soon as the data processing finishes.

If the paper error indicator flashes on the LCD:

The paper is jammed. Turn off the printer and turn it on again, take out the paper tray, and then remove the jammed paper from the paper outlet. If you cannot remove the jammed paper, consult with your Sony dealer or service facility.

If no indicator is lit or flashing:

The thermal head may be overheated. Leave the printer until the head cools down and the printer resumes printing.

how do it lits? flashes or permanent? and kindly indicate if its attention indicator or ready indicator...
cause in every flash and lits of that indicators have meaning...

(blinking every 5 seconds) Toner Low Indicates that the toner cartridge is nearly empty. Purchase a new toner and have it ready for when Toner Empty is indicated. (solid) Toner Empty Replace the toner cartridge with a new one. User's Manual is available at the following location: http://www.brother-usa.com/Data/Documentation/Printer/User/UM_HL1440_1450_1470N.pdf Hope this helps.