1. Printer Model List

 

Printer Series	Printer Model	Current Firmware Version	Downgrade to Firmware Version
HP 95X Series	HP OfficeJet Pro 8210 All-in-One Printer	1919A	1834A
	HP OfficeJet Pro 8216 All-in-One Printer
	HP OfficeJet Pro 8218 All-in-One Printer
	HP OfficeJet Pro 8710 All-in-One Printer	1919BR	1848A
	HP OfficeJet Pro 8715 All-in-One Printer
	HP OfficeJet Pro 8718 All-in-One Printer
	HP OfficeJet Pro 8720 All-in-One Printer	1919BR	1848A
	HP OfficeJet Pro 8725 All-in-One Printer
	HP OfficeJet Pro 8730 All-in-One Printer	1919A	1903B
	HP OfficeJet Pro 8740 All-in-One Printer
	HP OfficeJet Pro 8745 All-in-One Printer
	HP OfficeJet Pro 7720 Wide Format All-in-One Printer	1909B	1851A
	HP OfficeJet Pro 7730 Wide Format All-in-One Printer	1909B	1851A
	HP OfficeJet Pro 7740 Wide Format All-in-One Printer	1942A	1849A
	1828A (No new firmware)
HP 90X Series	HP OfficeJet 6950 All-in-One Printer	1938A	1847A
	HP OfficeJet 6954 All-in-One Printer	1938A	1847A
	HP OfficeJet 6962 All-in-One Printer	1938A	1847A
	HP OfficeJet Pro 6960 All-in-One Printer	1938A	1847A
	HP OfficeJet Pro 6968 All-in-One Printer	1938A	1847A
	HP OfficeJet Pro 6970 All-in-One Printer	1938A	1847A
	HP OfficeJet Pro 6978 All-in-One Printer	1938A	1847A
HP 97X Series	HP pagewide Pro 352dw	1937D	1829A
	HP pagewide Pro MFP 377dw	1937D	1829A
	HP PageWide Pro 452dn	1937D	1908C
	HP PageWide Pro 452dw	1937D	1829A
	HP PageWide Pro MFP 477dw	1937D	1829A
	HP PageWide Pro 552dw	1937D	1829A
	HP PageWide Pro MFP 577dw	1937D	1829A
	HP PageWide Managed P55250dw	1937D	1829A
	HP PageWide Managed MFP P57750dw	1937D	1829A

 

Note: Please choose the indicated software to downgrade the firmware according to your printer model and current firmware version.
The suitable firmware downgrade software can be downloaded by below links:

for HP 973 series：https://ufile.io/zww9h12t

for HP 953 series：https://ufile.io/tdl8zf8g

for HP 903 series：https://ufile.io/zc1vh319

 

2. Before Firmware Downgrade

2.1 Ensure turning off “Automatically Update Check” function before downgrade.

2.2 Some downgrade package would be failure if your printer firmware updated to the newest version that newer than the above version.

3. How to downgrade

 

 

Recently, we have found that there are a variety of counterfeit toner cartridges with counterfeit ORINK trademarks on the market, or to promote third-party products under the name of ORINK. In order to enable the final consumer to recognize the difference between our genuine ORINK premium product and the fake ORINK, here we repeat the Identification method for genuine ORINK toner cartridges.
Below is package of genuine ORINK premium toner.


 

Below picture shows the labels on genuine ORINK premium toner, including one ORINK Hologram label, one model label with ORINK logo and one tracking number with ORINK logo.

Some of the counterfeit ORINK brand packaging that we found in the market:

Some of the third-party products that we found on the Internet in the name of ORINK:

 

For the above-mentioned counterfeit products appearing on the market, our company will cooperate with local agents to confiscate or destroy them through legal channels. We also hope that consumers can purchase genuine ORINK brand toner cartridges with product quality assurance through local authorized agents. If you find counterfeit ORINK brand products on the market or damage the reputation of the ORINK brand, please contact us or our local agents immediately. We need your help to maintain ORINK reputations jointly. 
 

An option you have when your ink runs dry is refilling your empty inkjet cartridge with fresh ink from inkjet refill kits. Depending on the manufacturer, many inkjet cartridges can be refilled 3-10 times with inkjet refill kits. Inkjet refill kits allow you to refill the empty cartridge yourself.

  - When you print a large quantity of papers, check the remainder of the ink or status of the head by looking at the print outputs.
  - When you haven't used the printer for a long time, clean the head before print.
  - Replenish the color cartridge even when only one color is exhausted.
  - When you won't be using the printer for an extended period, keep the cartridge in a cartridge storage.    If your printer doesn't have one, wrap the head part with a plastic wrap to keep it from air contact.
  - Caution: Do NOT use general cellophane tape.
  - When the nozzle dried up after having been neglected for a long time, soak it in warm water of 40 to    50 °C, completely remove the water from the cartridge, install, clean the head, then use it.
    (It is very difficult to recover a damaged nozzle.)

- The cartridge head is damaged by excessive use while the ink is insufficient.
- The nozzle is logged after being left unused for a long time.
- The contact surface at the side of the cartridge is wet or damaged so that electric signals cannot be transmitted normally.
- Damaged head or contact surface.
- Due to the cartridge's natural characteristics such as end of its lifespan.

Place the clogged nozzles in a shallow dish filled with warm water and soak them until dried ink begins to flow freely from the nozzle. After several minutes of letting the dried ink flow, remove the nozzle from the water and gently dry it with a soft tissue or cotton swab. Reinstall the cartridge and run the print head cleaning mechanism (described in your printer's operating manual). If this does not work, repeat the procedure. If your cartridge still does not print after repeating, you will need to purchase a new cartridge because the print head of your existing cartridge is probably damaged.

Check if the cartridge is empty. If it is not, place the cartridge on a soft tissue, allowing some ink to leak out. Allow the nozzle to then sit for a few minutes before gently wiping it with a soft tissue or cotton swab. Reinstall the cartridge, run the print head cleaning utility (described in your printer's operating manual) and attempt to print again.