Difference between revisions of "Frequently Asked Questions"
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+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big> | ||
+ | Question: Using the Raspberry Pi image provided by the CD/net disk, cannot use the LCD normally. | ||
+ | </big></big></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"> <b><big>Answer:</big></b></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | * Confirm that the hardware connection is correct and the contact is good. | ||
+ | |||
+ | * Determine whether TF card is normal and whether the system is started normally. | ||
+ | |||
+ | * The PWR lamp is always bright when the Raspberry Pi is started, and the ACT light is flashing.If you find both lights on, | ||
+ | |||
+ | it may be the TF card does not successfully burn the image file,or that the TF card is not in contact with the Raspberry Pi. | ||
+ | |||
+ | * Recommend using 5V 2A power adapter to power the Raspberry Pi. | ||
+ | |||
+ | * If you use a computer USB interface, you may not be able to activate the Raspberry Pi due to insufficient power supply. | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: What is the reason for the LCD not displayed using the image provided by the Raspberry Pi official?</big></big></font> | ||
+ | |||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"> <b><big>Answer:</big></b></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>LCD needs to be installed driver to display correctly, please refer to "How to install the LCD driver (En)" related documentation. | ||
+ | </li><li>It is recommended to use the image file provided by us first to test. After the test is passed, use the image file of Raspberry Pi official and installed the driver. | ||
+ | </li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: How to switch back to traditional monitor for display?</big></big></b></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"><big>Answer<b>:</b></big></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>Please refer to "How to install the LCD driver (En)" related instruction document, and use the following command: | ||
+ | <pre style="border: 1px dashed black;color:black"> | ||
+ | sudo ./LCD-hdmi | ||
+ | </pre> | ||
+ | </li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: Why the LCD works but flickers?</big></big></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"> <b><big>Answer:</big></b></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>This problem is likely due to insufficient power supply. | ||
+ | </li><li>If you are using the Raspberry Pi, please use the power supply of 5V full 2A to power the Raspberry Pi, | ||
+ | </li></ul>and connect the Raspberry Pi and the LCD by the short USB cable we provided. | ||
+ | <ul><li>If it is used as a computer monitor, do not use poor quality USB cable or extension cord connection, | ||
+ | </li></ul>do not receive extend the USB port to get electricity, please use the USB cable we provided. | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: Why the Raspberry Pi unable to work properly after updating the Raspbian system?</big></big></font><font color="#EEE"><big>?</big></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"><big>Answer<b>:</b></big></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>The update needs to be done in the following manner, otherwise the image cannot run: | ||
+ | <pre style="border: 1px dashed black;color:black"> | ||
+ | sudo apt-mark hold raspberrypi-bootloader | ||
+ | sudo apt-get update | ||
+ | sudo apt-get upgrade | ||
+ | </pre> | ||
+ | </li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: Why the LCD is connected to the computer HDMI, but cannot be displayed normally?</big></big></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"> <b><big>Answer:</big></b></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td>Make sure the HDMI interface of the computer can be output normally. | ||
+ | |||
+ | The computer only connects to the LCD as a display device, and does not connect to other monitors (unplug other monitors). | ||
+ | |||
+ | Connect the USB first, then the HDMI. | ||
+ | |||
+ | Try to restart your computer. | ||
+ | |||
+ | You must use the Windows operating system. <ul><li></li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <big><big>Question: How to turn on the Bluetooth function on the Raspberry Pi?</big></big></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"><big><b>Anwer:</b></big></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>Method 1: upgrade to the official latest image of the Raspberry Pi (the Bluetooth function has been turned on by default after 2016-05-27-raspbian-jessie); | ||
+ | </li><li>Method 2: manually turn on Bluetooth.<br /> | ||
+ | <pre style="border: 1px dashed black;color:black"> | ||
+ | sudo apt-get install pi-bluetooth | ||
+ | sudo apt-get install bluetooth bluez blueman | ||
+ | systemctl status bluetooth | ||
+ | sudo systemctl start bluetooth | ||
+ | sudo reboot | ||
+ | </pre> | ||
+ | </li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table><br /><table style="margin-top: 10px; border-right: 20px solid transparent; border-top: 20px solid #008DE6;"> | ||
+ | |||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #008DE6;"> | ||
+ | <tr> | ||
+ | <td><font color="#FFF"> <b><big><big>Question: Why unable to display full screen or incomplete when using 5”, 5”-B, 7”-B, or 7”-C HDMI screen?</big></big></b></font> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <table style="margin-top: 10px; border-left: 20px solid transparent; border-top: 20px solid #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <table class="roundy mw-collapsible" style="margin-top: -30px; margin-left: -5px; margin-right: -5px; background: #DDD;"> | ||
+ | <tr> | ||
+ | <td> | ||
+ | === <font color="#008DE6"> <b><big>Answer:</big></b></font> === | ||
+ | </td></tr> | ||
+ | <tr> | ||
+ | <td> | ||
+ | <ul><li>Check if the HDMI is plugged in and output is normal. | ||
+ | </li><li>Open the config.txt file in the TF card root directory to check the HDMI configuration. | ||
+ | </li><li>5", 5"-B and 7"-B 800*480 should be configured as follows:<br /> | ||
+ | <pre style="border: 1px dashed black;color:black"> | ||
+ | hdmi_group=2 | ||
+ | hdmi_mode=1 | ||
+ | hdmi_mode=87 | ||
+ | hdmi_cvt 800 480 60 6 0 0 0 | ||
+ | </pre> | ||
+ | </li><li>7"-C 1024*600 should be configured as follows:<br /> | ||
+ | <pre style="border: 1px dashed black;color:black"> | ||
+ | hdmi_group=2 | ||
+ | hdmi_mode=1 | ||
+ | hdmi_mode=87 | ||
+ | hdmi_cvt 1024 600 60 6 0 0 0 | ||
+ | </pre> | ||
+ | </li></ul> | ||
+ | </td></tr></table> | ||
+ | </td></tr></table> | ||
+ | <br /> |
Revision as of 17:02, 15 May 2019
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