Question about HP Scanjet 5470c Flatbed Scanner

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No power No indicator lights or any sounds when plugged in and power button pushed. Can't seem to find anyone who fixes these. I always liked the quality of the output. Is it even worth trying to fix?

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Re: No power

Purchased an exact replacement for the power cable (less than $20 on Ebay) - scanner powers on!

Posted on Dec 27, 2007

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Re: No power

I've done it, using an adjustable power supply all i needed was 12VDC - 2Amp, the power connector going to the scanner is a 4 pin mini-DIN male, so i've ripped of the cable from the original bad power module, cable has inside 2 wires one black one white and a shielding. Black and schielding are connected together and are going to the minus, the white one is going to +12V

guess what? .... my scanner is working again

Posted on Dec 27, 2007

Re: No power

I would replace the power module (adaptor). Same issue happened to my 5400c in early November, too!

Happy Holidays!

Posted on Dec 01, 2007

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Hi, i have a Canon dr 9050c scanner. I have the folowing Problem: When the Scanner power on then the Tray move up and down. if i start a scan from PC than can the Scanner not lift up the tray. It sounds...

It sounds like you diagnosed it.
The tray "paper detect sensor" thinks it has paper in it, and if it doesn't have paper in it...there's a problem with the sensor.
Take the tray off and inspect the sensor. Blow out around the sensor and it's PCB and make sure it is not out of position. Check the sensor lens for anything blocking it, and retest. If it still shows always on, then replace the sensor. Press the "count only" button to illuminate it, and press the "start" button. If the scanner works properly (tray lifts, pulls paper through the scanner, and counts it)...well then you have software or connectivity issue.

Hope that helps,
Scan-R-Store Scan Store provides service and maintenance contracts on all Canon Fujitsu...

Aug 26, 2013 | Canon DR Scanners

1 Answer

My scanner was worling fine. I scanned a doc then printed it. Went to can another then nothing. I got an error message saying that the pc could not find the scanner. I noticed that there is not elec...

On my scanner the pc data cable seems to come loose which makes for intermittent disconnects just like you had. It also does a thing where if you don't use it for even a short period it goes into whats best described as a sleep mode. This almost always requires it be unplugged and plugged back in before it is recognised again. I have a feeling from your description that what you are seeing could be a variation of one of these. The scanner works just fine but it does these annoying things.

As its a scanner there isn't much (almost nothing) we can check or adjust. You can check the data and power cables. Gently give them a wiggle and see if you can get the scanner to nod off again. Usually the problem will be the computer end of the data cable or the scanner power plug or jack. These may be loose or worn and making intermittent contact if moved bumped or vibrated. If you experience more power outages than it seeming to be asleep then the power jack could be loose or the wire inside the power cable may have been damaged. If the wire is damaged you may be able to find where by wiggling the wire. Sometimes you will see a bend where it should be straight. If you don't the problem is usually by the plug end. If you can confirm the problem is the power wire then you can just replace it.

As far as bulb replacement, there shouldn't be any user serviceable parts. The light source inside is a series of leds on the scan bar. These create that light greenish light (most models) as it scans. It should show an error if there is a light problem. You can check by watching the light leakage as it scans. If there is light you are ok, reduced light should just mean darker scan images.

It is possible you have a drive motor issue that is causing excess power use and overheating. If you have used it a lot the guide tracks will wear or get dirty and cause extra friction and the little motor has to work harder and harder until it fails. You could possibly (really doesn't sound like it though) be seeing the early failure of the motor. Unfortunately if there is a serious hardware problem it is almost never worth fixing a scanner. It is much cheaper to replace it. My bet is you are seeing a cable issue.

Oct 24, 2010 | HP Scanjet 4300c Flatbed Scanner

1 Answer

Power button seems to have no effect , indicater light is on but windows 7 does not respond saying there is no driver

Sounds like you have a hardware/firmware issue. Unplug any new hardware - reboot - after logging in then replug your hardware

May 15, 2010 | Umax Astra 3400 Flatbed Scanner

1 Answer

My scanner sounds broken and reads "2, 250 TWAIN Error"

Are you sure it hasn't become locked underneath? try repeating the unlock procedure a few times?

Feb 06, 2010 | Canon CanoScan LiDE 70 Flatbed Scanner

1 Answer

The Hardware. The Motor inside my scanner stuck?

Sounds like you have the Shipping Lock on.
There is a lever to turn when you unpack your scanner.
This is used to lock the hardware in place while the device is being shipped so nothing shakes loose.
It needs to be unlocked when you have it unpacked and setup.

Look for a lever like this in the picture and turn it to the Unlocked position.

Hope this helps.

Dec 11, 2009 | Canon CanoScan N640P Flatbed Scanner

2 Answers

Epson perfection 2400 photo scanner stuck with flashing red light

You may have accidently pushed the LOCK button - this button is used to LOCK the carriage into place when moving the scanner to another location or shipping it.

Check for a button and the picture of a LOCK, it is usually at the back of the scanner, you can push it left or right, and you have an open lock and a closed lock picture under it. Make sure you didn't accidently push it to the LOCK position when holding the scanner - that loud sound means your carriage is locked and cannot move - once you set the button to UNLOCK this should solve your problem.

Jul 27, 2009 | Epson Perfection 2400 Photo Flatbed...

2 Answers

My Canon DR-2050C keeps jamming when I try to scan more than 1 page???

I finally solved my problem. Now it works like new.


- The spring that returns the next sheet detector (small black plastic rocker arm between the two rollers on the back side) came off. So the scanner cannot detect transition from one page to the next. This spring is located inside the device and you cannot fix it from the outside.
- You know if you have this problem if you don't hear a "click" sound after each page is scanned. Without the spring attached the rocker will not return on every page. When it doesn't return the scanner think it is still on the first page and will not scan the next page. The "click" after each page is NORMAL. Without the click is the first sign your spring came off.

Solution (Only recommended for people handy with hardware and the unit is no longer under warranty)

1. Turn off power and unplug the device.
2. Pop off the plastic cover to the back of the scanner
3. Remove the screws that holds the plastic cover to the back.
4. Remove the screw by pushing on the retainer clips. DO NOT loosen any gears or motors.
5. Locate the rocker arm and re-connect the (very small) spring

6. Warning - if the LED light pipe falls out be careful how you put it back. This is a transparent widget at the top to route a LED light to the top of the device to indicate the power on status.

Sorry I didn't take pictures. If this sounds too complicated, send it to Canon for repair. Took me about a day to figure out exactly what was wrong and how to disassemble the scanner to fix it.

Good luck.

Jul 11, 2008 | Canon DR-2050C Path-Through Scanner

1 Answer

My CanoScan D660U is not powering up when i plug it in

Image scanners use a bright light (usualy LED's but sometimes fluorescent) to get the image. If that is the "light" that didn't come on, it may need replacing. If the "light" is a power indicator, a surge might have fried the circuits. Service on consumer products is often impossible to do yourself and sometimes more expensive than a replacement. Try a Google on your scanner # and "disassembly" if you feellucky and are handy with tools. Best bet: replace it.

Feb 24, 2007 | Canon CanoScan D660U Flatbed Scanner

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