MY SCANNER DIDN'T SCAN, THIS MESSAGE APPEARS ON THE COMPUTER...

1. Press Hold.
2. Enter the channel number you want to unlock and press Hold again. (You can also press Hold and scroll to the channel.)
3. Press l/O. L/O (or TL/O) disappears.

Unlock all Channels in Banks Currently Enabled for Scan

1. Press Hold to stop scanning.
2. Press and hold l/O until Confirm Unlock All Channels? appears in the display.
3. Press Pgm/E to unlock all or . Clr to cancel.

Locking/Unlocking Banks When you are scanning conventional banks, the scanner displays the digit corresponding to all unlocked banks. To lock out a bank so that the scanner does not scan its channels, press the letter that corresponds to the bank. The bank's letter disappears from the display. To unlock locked-out banks, simply press that bank's letter again. The bank's letter appears on the display and the scanner includes that bank when scanning. Note: You cannot lock out all banks. One bank must be unlocked at all times. Locking/Unlocking Channels To lock out a channel so that the scanner does not stop on it while scanning, press L/O when the scanner is stopped on that channel, or manually select the channel and press L/O. To unlock the channel, manually select it and press L/O again. Restoring All Locked Out Channels You can restore all locked-out channels in a bank only when the bank is selected for scan. Follow these steps to restore all locked-out channels in a bank. 1. If you de-selected the bank, press SCAN then press the bank's letter. 2. Press MANUAL. 3. Hold down L/O for about 2 seconds. The scanner beeps twice and unlocks all To delete a stored frequency, press 0 then press E. Channels with no frequencies are automatically locked out hope this helps

Locking/Unlocking Banks When you are scanning conventional banks, the scanner displays the digit corresponding to all unlocked banks. To lock out a bank so that the scanner does not scan its channels, press the letter that corresponds to the bank. The bank's letter disappears from the display. To unlock locked-out banks, simply press that bank's letter again. The bank's letter appears on the display and the scanner includes that bank when scanning. Note: You cannot lock out all banks. One bank must be unlocked at all times. Locking/Unlocking Channels To lock out a channel so that the scanner does not stop on it while scanning, press L/O when the scanner is stopped on that channel, or manually select the channel and press L/O. To unlock the channel, manually select it and press L/O again.

Hello pjbenven!

To use the scan features, your device and computer must be connected and turned
on. The printer software must also be installed and running on your computer prior to
scanning. To verify that the printer software is running on a computer running
Windows, look for the device icon in the system tray at the lower-right side of the
screen, near the clock. To verify this on a computer using the Mac OS, open the HP
Device Manager, and click Scan Picture. If a scanner is available, it will launch the HP
ScanPro application. If it is not available, a message appears to let you know that a
scanner was not found.

To send a scan to a program on a computer from the device control panel (direct
connect)
1. Load the original on the scanner glass. For more information, see Load originals.
2. Press the left arrow or the right arrow to select the Scan function, and then
press OK.
3. Press right arrow to select the program that you want to use (such as the HP
photo and imaging software), and then press OK.
4. Press Start.

You can find more information on the serivece manual
http://h10032.www1.hp.com/ctg/Manual/c01368573.pdf

PROGRAMMING YOUR SCANNER

For a a comprehensive database of active frequencies in your area, visit:

www.RadioReference.com


1. Turn on your scanner by turning VOLUME clockwise.

2. Press [MANUAL], enter the channel number you want to program, then
press [MANUAL] and [PROGRAM]. The channel number flashes to indicate
you are programming the channel.

3. Enter a frequency.

4. Press [ENTER] to store the frequency. If you make a mistake in Step
3, ERROR appears on the display. Proceed again from Step 3.

5. If you want your scanner to pause after each transmission before
scanning to the next channel, press [DELAY] so that DELAY appears in
the display. See "Using the Delay Feature."

6. To program more channels, repeat Steps 2-4. If you want to program
the next channel in sequence, simply press [PROGRAM] and repeat Steps
3 - 4.

SETTING THE VOLUME AND SQUELCH CONTROLS

Use the SQUELCH control to decrease your scanner's sensitivity to weak
signals. This allows the scanner to receive only the strongest
transmissions.

1. Turn the SQUELCH and VOLUME controls fully counterclockwise.

2. Turn the VOLUME control clockwise until you hear a hissing sound.

3. Slowly turn the SQUELCH control clockwise until the hissing sound
stops.

SCANNING THE CHANNELS

To begin scanning the channels, press [SCAN]. Your scanner scans through
all the channels except the ones you have locked out. Be sure to read the
following sections to get the full benefit from your scanner's special
features.

USING THE DELAY FEATURE

Many agencies use a two-way radio system that might have a 2 second silence
(or more) between a query and a reply. To keep from missing a reply,
program a delay on the channels you identify as operating this way.

To program a delay, select the channel and press [DELAY] so that DELAY
appears on the display. Now when your scanner pauses at an active channel
when scanning, it waits for 2 seconds after the completion of each
transmission on that channel before it resumes scanning.

If you do not want your scanner to pause, select the channel and be sure
that DELAY is not on the display. If DELAY appears on the display, press
[DELAY] to turn it off for that channel.

LOCKING OUT CHANNELS

You can make your scanner scan more efficiently by locking out channels
that you have not programmed. Manually select the channel and press [LOCK
OUT] so that LOCK OUT apperas on the display. This is also handy for
locking out channels that have a continuous transmission. You can still
manually select locked-out channels for listening.

To unlock a channel you have locked, manually select the channel and press
[LOCK OUT] so that LOCK OUT disappears from the display.

NOTE: You cannot lock out Channel 1.

USING THE PRIORITY FEATURE

Channel 1 is designated as your scanner's priority channel. You can turn
on the priority feature so that you do not miss transmissions on Channel 1,
even if you are monitoring another channel.

Press [PRIORITY] so that PRIORITY appears on the display. Now your scanner
checks Channel 1 every 2 seconds, and stays on the channel if there is any
activity.

MANUALLY SELECTING A CHANNEL

You can continuously monitor a specific channel without scanning. This is
useful if you hear an emergency broadcast on a channel and do not want to
miss any details-even though there might be periods of silence-or if you
want to monitor a specific channel.

Follow these steps to manually select a channel.

1. Press MANUAL.

2. Enter the channel number.

3. Press MANUAL again.

Or, if your scanner is scanning and stops at the desired channel, press
MANUAL one time. (Pressing MANUAL additional times causes your scanner
to step through the channels.)

LISTENING TO THE WEATHER BAND

The FCC (Federal Communications Commission) has allocated several channels
for use by the National Oceanic and Atmospheric Administration (NOAA). We
have preprogrammed your scanner with all of the frequencies available to
NOAA. To hear your local forecast and regional weather information, simply
press [WX]. Your scanner begins scanning through the weather band, and WX
SEARCH appears on the display.

Your scanner should stop within a few seconds, and you hear the local
weather broadcast. If the broadcast is weak, you can press [WX] again
to scan through the rest of the weather band.

Bill B

Your Train source may be your scanner Twain driver. Reinstall the driver. 
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=235&modelid=11463#DownloadDetailAct

check if it connection issue
check all cables if it is connected directly
check device manager for imaging device see if there is a conflict update the driver
if same hotswap, then try another cable
if connection ok then same issue

trash and reinstall and reinstall the epson scan: follow this

Scanner Driver Removal

If you see a window that says User Account Control at any point, click Continue.

1. Disconnect the USB cable from the printer and close any open windows.
2. Click Start, then select Control Panel.
3. In the window that opens, click Uninstall a Program under the Programs heading.
4. Select Epson Scan, then click Uninstall/Change.
5. Follow the on-screen instructions to complete the removal and restart your computer.

Once the removal is complete, please do the following:

Scanner Driver Download

1. Go to www.epson.com select your contry
2. Under All-In-Ones, select Flatbed, then select your model from the list.
3. Click on Windows under Drivers & Downloads.
4. Download the most current version of the Scanner Driver for your Windows operating system to your Desktop. Make a note of the file name in order to easily retrieve it.

Scanner Driver Install

1. Double-click the downloaded file on your desktop.
2. Click OK, Unzip, then OK again.
3. Follow the on-screen instructions to complete the installation and license agreement. The installer will copy the files to the system.
4. Click Finish when prompted.
5. Turn your unit on and reconnect it to the computer after the installation is complete.
6. Windows should detect new Hardware and complete the installation automatically.
7. If a New Hardware Wizard appears, allow it to search automatically.
8. If a message appears indicating The Scanner has not passed Windows Logo testing, click Continue Anyway. Then click Finish.
9. Restart your computer before testing the scanner software.

The instruction to use scanner in HP Laserjet 3050

Click Start, click All Programs or Programs, and then click HP. Click HP LaserJet
3050/3052/3055/3090 all-in-one, and then click Scan.

Click Setup.

Select Change the destinations that show up on the all-in-one control panel when I press
the Scan To button, and click Next.

Select Allow me to scan by pressing the Scan To button on the all-in-one....
Move the destinations from the PC window to the All-in-one window.

Click Update. See the online User Guide for complete information


Source : Manual for HP Laserjet 3050

Thanks for using Fixya


SAM ANDERSON

See

http://support.dell.com/support/edocs/systems/a940/a940en1.pdf

Page iv identifies the location of the scanner lock

Page 44 contains the following

• You unlock the scanner bed. For help locating the scanner lock, see the picture of the printer on page iv.

Page 51 contains

Unlock Scanner message
The scanner is locked. To unlock it:
1 Press Power to turn the printer off.
2 Use both hands to lift the printer (scanner unit) until the scanner support
holds it open.
To the left and beside the scanner support is the scanner lock. For help, see
page iv.
3 Pull the scanner lock toward you to unlock the scanner.
4 Using both hands, lift the printer (scanner unit).
5 Push and hold the scanner support back.
6 Lower the printer (scanner unit) until it is completely closed.
7 Press Power to turn the printer back on.

I hope this will help. It shows locking and unlocking ids while scanning and while in a bank.


Locking/Unlocking IDs Contents You can lock out IDs you don't want to hear such as telemetry, MDT's, dog catcher, etc. To Lock out an ID while scanning, quickly press L/OUT while the ID is displayed. To Lock or Unlock an ID manually: 1. In Manual mode select any channel of the bank you want to lock or unlock an ID in by entering the bank number and channel number (Ex: 001) then press MAN to advance to the channel. 2. Press PGM then TRUNK to put the scanner in program and trunk modes. You will see the bank number (0-9), list number (0-4), and the list status (ON or OFF) on the 1st line, the ID# in the list (0-29) on the 2nd line, the ID on the 3rd line, and bank tag on the 4th line (if programmed). 3. Press TRUNK (each time) to select the ID list (0-4). 4. Select the ID# (0-29) by pressing or (or press and hold; faster) then press L/OUT to lock or unlock the ID. An L will appear to the right of the ID# if the ID is locked out. 5. Press MAN to exit programming. To Unlock IDs in a bank: 1. In Manual mode select any channel of the bank you want to view the locked out IDs in by entering the bank number and channel number (Ex: 001) then press MAN to advance to the channel. 2. Press PGM then TRUNK to put the scanner in program and trunk modes. You will see the ID list. 3. Press FUNC then L/OUT (each time) to view the locked IDs. Press L/OUT to unlock the ID. The next locked out ID will appear. 4. Press MAN to exit programming. Note: You cannot unlock all IDs at one time.