Replace the toner cartridge but toner level indicate 5% ?Any reset needed ?

Usualy what i did i use toner chip (100%) fix it to toner cartridge then insert to machine, check the amount if 100% then pull out the toner cartridge and replace old chip insert back to the machine, check it will be 75%.

Usualy white lines are a signal for you that is time to replace a toner cartirdge.
Your machine may inform you that you need to replace a toner cartridge, but sometimes the toner levels are low and the machine doesn't indicate that.
Another thing that you may try is to clean all toner cartridges using each corona wire.
If you need to replace your toner cartridge check this easy and helpful way to replace toner cartridge.

Thanks for the tip.

Ensure that the Toner Cartridge is installed correctly (fully
seated into the printer). Try a new Toner Cartridge. If the
problem continues, try this

14 NO EP CART Message
The printer detects the presence of the Toner Cartridge and the
level of toner present in the cartridge through the condition of the
ANTIN signal. The ANTIN signal becomes part of the serial data
stream used to communicate with the DC Controller (see Figure
7-5 for cartridge components). Troubleshoot the 14 NO EP CART
(or INSTALL TONER CARTRIDGE) message as follows:
1 Reseat the Toner Cartridge. Try a new or known good Toner
Cartridge.
2 Check the High Voltage Contacts for damage. If the contacts
are dirty or damaged, clean the contacts after the repair.
3 Replace the High Voltage Power Supply.
4 Check and reseat the HVPS cable.
5 Replace the DC Controller.

In this case, actually it is not the Black toner that got depleted. Here the message being displayed indicate that one of the color Toner supply need to be replaced as it got depleted and currently the printer is printing in Black and white using the Black toner cartridge.

in this case, to troubleshoot these issues please try performing the following and check for the results.

* 1. Check for the level of the toner cartridges:

a) Check from the HP Toolbox application. Here are the steps to be performed from your PC:

* Access the Toolbox software.
* Select the Status tab.
* Select the Device status option.

Here you can check for the supplies status in terms of the % remaining for each toner cartridges.

b) By checking the supplies status from the printer control panel display.

On the printer display when printer is in Ready mode the supplies status can be checked from the supplies level indicator. Each toner cartridge and the Imaging drum level will be indicated by a bar which varies according to the level of the supplies present.

c) Print the supplies status page from the printer.

* On the printer control panel menu, press Menu .
* Use the (Right Arrow) button to select Reports, and then press Enter .
* Use the (Right Arrow) button to select Supplies Status, and then press Enter .

If any of the color toner cartridges and the Imaging drum have a low supply level replace them with genuine HP print cartridges.

The part numbers of the consumables are as follows:

* Black print cartridge - Q3960A
* Cyan print cartridge - Q3971A
* Magenta print cartridge - Q3973A
* Yellow print cartridge - Q3972A
* Imaging Drum - Q3964A

You don't necessarily have to reset the toner indicator...you can actually simply reset the flag gear on the inside of the toner it self. The flag gear is a gear that winds down as you use the toner and when it gets to the end, it pops off and your brother printer will NOT print without it being reset.

You can find instructions here. It looks complicated, but is quite easy. I have 11 brother printers in my office and reset the cartridges once they say they are empty. We typically get another 400-800 pages out of them.

http://www.castleink.com/265/cartridge/TN580.pdf
Only do the following figures as you are not refilling the toner with ink, just resetting it:

FIG 5
FIG 6
FIG 14
FIG 15
FIG 16.