Here is what HP has on the subject of the triangle light flashing:
1 - Attention Light
2 - Ready Light
3 - Go Light
Figure 2: Printer light key
1 - Symbol for light off
2 - Symbol for light on
3 - Symbol for light blinking
Door open, media out, no print
cartridge, or media jam
The printer is in an error state that
requires operator intervention or help.
Check the following:
Figure 8: Paper jam
13.JJ.NT JAM IN TRAY 1
13.JJ.NT JAM IN TRAY X
- The print cartridge door is completely
- Media is loaded.
- The print cartridge is correctly installed in
- There is no media jam.
The Attention LED is blinking.
Check paper loading then open and close top cover.
When there is a jam in tray 1, verify the paper is loaded correctly, open and close the top cover. Pressing GO is ignored.
When there is a jam in tray X, verify the paper is loaded correctly, open and close the top cover. Pressing GO is ignored.
These are the error explanations for just the flashing triangle light, there are many more, but none for just the flashing triangle.
If the light pattern is different let me know (other lights on as well)
-Hope this helps.