Fix Your Stuff

Repair Guides

Learn how to fix just about anything with our step-by-step guides.

App

Your pocket repair helper.

FixBot

The friendly AI repair assistant.

Repairability

Learn why fixable products make sense.

Teardowns

Get a sneak peek inside the latest gadgets.
Community

Answers Forum

Share solutions and get help from a friend.

Find Your Community

Find teams, events, and fellow fixers.

Help Out

Help make repair knowledge free and accessible for everyone.

Right to Repair

Learn about the Right to Repair movement and how to be an advocate.
Store

Featured

Quality parts and tools backed by our lifetime guarantee.

Tools

Shop our wide selection of precision tools.

Parts

Shop parts backed by our quality guarantee.

iPhone Batteries

Batteries tested and guaranteed plus a kit with everything you need.

Free Shipping on Domestic Orders $75+

HP Photosmart C4780 Repair Forum

Ask
Learn How It Works Ask a Question

The only question in the past 3 months has no reply - Help answer it!

0%
All Questions
HP Photosmart C4780

HP Photosmart C4780 most helpful threads

clear
Most Helpful
All Most Helpful Unanswered Newest
All Questions
HP Photosmart C4780
3 Answers
How to replace a broken scanner glass?

accepted HP Photosmart C4780 3 Answers

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
5 Answers
Loud ratcheting noise from printer

accepted HP Photosmart C4780 5 Answers

Philip Ward

Commented

commented by Philip Ward

HP Photosmart C4780
4 Answers
will not connect to a wireless network

accepted HP Photosmart C4780 4 Answers

oldturkey03 860.3k

Answer edited

answer edited by oldturkey03

HP Photosmart C4780
4 Answers
Why is my printer stuck on the screen with the HP logo?

accepted HP Photosmart C4780 4 Answers

Aaron Gosling

Commented

commented by Aaron Gosling

HP Photosmart C4780
5 Answers
Paper will not feed into printer

accepted HP Photosmart C4780 5 Answers

derick

Answered

answered by derick

HP Photosmart C4780
1 Answer
How to make copies with only black ink cartridge installed

accepted HP Photosmart C4780 1 Answer

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
1 Answer
New ink cartridge but says needs new one

accepted HP Photosmart C4780 1 Answer

mayer 690.5k

Accepted an answer

answer accepted by mayer

HP Photosmart C4780
1 Answer
Screen says "Print cartridge problem" HP Photosmart C4780

HP Photosmart C4780 1 Answer

Zee

Commented

commented by Zee

HP Photosmart C4780
1 Answer
Scan Failure on second attempt.

accepted HP Photosmart C4780 1 Answer

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
1 Answer
My inkjet isn't being an inkjet

accepted HP Photosmart C4780 1 Answer

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
1 Answer
I am installing new ink

accepted HP Photosmart C4780 1 Answer

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
0 Answers
HP Photosmart C4780 factory reset - no options in control panel or EWS

unanswered HP Photosmart C4780 0 Answers

ex-Physicist

Asked

asked by ex-Physicist

HP Photosmart C4780
3 Answers
My printer wont scan.

accepted HP Photosmart C4780 3 Answers

Michael Lee

Answer deleted

answer deleted by Michael Lee

HP Photosmart C4780
2 Answers
door open on display

accepted HP Photosmart C4780 2 Answers

oldturkey03 860.3k

Accepted an answer

answer accepted by oldturkey03

HP Photosmart C4780
2 Answers
How do I remove the printer cover?

accepted HP Photosmart C4780 2 Answers

T0m McDonald

Answered

answered by T0m McDonald