Question about IBM Lenovo ThinkCentre M55e PC Desktop
No screen appear and 4 beep sound continuous listen
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Posted on Jan 02, 2017
Your problem is hardware-related. Either memory or power supply.
Remove the memory and add back one at-a-time and boot to see which one (if any / either) is bad.
If not, the second culprit is the power supply, which would need to be replaced.
Hope this helps.
Posted on Aug 04, 2009
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Unintended reverberation, or "echoing," from your computer speakers is a common problem that can arise from improper setup of your audio properties.
Resetting all of your audio information to default will correct this problem, allowing you another chance to strike a good balance to satisfy your audio tastes.
This can be accomplished by accessing the Sounds menu in your operating system.
Select the "Start" menu from the bottom-left corner of your screen, and click on "Control Panel." Find the "hardware and Sound" button and click to select.
Click on the sound icon and select the third tab labeled "Sounds" in the window that appears. A list of sounds will appear, beginning with "Asterisk." Click on a sound to highlight and select test.
Listen to hear if the echoing problem occurs.
If it does, you need to configure your speakers or check to see if it is a third-party issue.
Select the first tab labeled "Playback" from the same window. Right-click on the "Speakers" icon. Click on "Configure Speakers" from the top of the list.
Choose a setup from the list that appears and select test to test different sound configurations for the speakers.
Listen to decipher if one configuration has less echo than another. If so, choose the speaker configuration without the echo to fix the problem.
However, if none of the configurations remove the echo, you need to attempt to troubleshoot the issue from "Safe Mode."
Turn on your computer if it is off or restart your computer. Continuously press the "F8" key until the "Advance Boot Options" screen appears.
Use your arrow keys to navigate the screen, pressing down until you have highlighted the "Safe Mode" option. Hit "Enter" to select. Wait for the drivers to load.
Log on from the "Administrator" account. Test the sounds again, and if the echo does not occur, the cause is a third-party driver or service.
hope this helps
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Your radio allows you to listen for weak signals on
the current channel at the press of a key.
To turn ON the Monitor Mode:
• For brief listening, press MON button. The RX
• Press and hold MON button for 2 seconds until
two beeps sound for continuous listening. The
receiver circuit stays open, letting both the noise
and weak signals to be heard.
To turn OFF Monitor Mode:
Press MON button to return to "Normal" mode,
and the RX icon stops blinking and disappears.
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