HP Deskjet 3750 Flashing Orange Light. Unresolved Troubleshooting

Joined
Jan 28, 2026
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Hello all.

I have owned an HP Deskjet 3750 printer for some years. It has just developed an issue with an orange light flashing. It is the light which is below and just to the right on the screen display.
I have followed recommended troubleshooting tips from elsewhere but the issue still persists.

1. taken out and replaced the 304XL cartridges. And even bought a replacement black ink cartridge.
2. Ensured there is no ink smeared on the connecting ink connection point
3. Done a hard reset

The continuous orange flashing light is also accompanied by the black ink indicator flashing, even though the cartridge is full.

For avoidance of doubt, I have never used (and never signed up for) the HP ink cartridges. Instead, I have always used 3rd party suppliers e.g. Cartridge World and Stinkyink.

Hope someone can advise.


BT.
 

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