TV doesn’t see Xiaomi Redmi on USB, but charges: full problem

You have connected Xiaomi Redmi to your TV through USB-And you can see, instead of having to access files or mirror the screen, you can see that it says, "Charge," and it's a common situation -- and it's not always the fault of the cable. USB They use different protocols: the first one works through the lines. VBUS and GND, The second one requires proper initialization. D+/D- Support for both devices.

The problem can be in the settings of the smartphone (MTP mode is not activated) and in the limitations of the TV (no support for USB OTG or outdated drivers). Next, we will analyze all possible causes, from the trivial to the technically complex, and give checklists for diagnosis.

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1.Verification USB-Cables: Not all cables are the same

The first thing to rule out is faulty or “charge” cables, many cheap cables have only 2 wires (VBUS and GND) and are physically unable to transmit data, especially “branded” powerbank cables or car charging.

How to check:

• 🔍 External inspection: bend the cable at the connectors - if you see fractures or bare wires, replace it.
• 📱 Test on another device: connect the cable to your computer.If Xiaomi Redmi is not defined as a drive - the cable is "chargeable».
• 🔧 Multimeter Test: Measure the resistance between D contacts+ and D-(2nd and 3rd contacts in) USB Type-A. If resistance is going to infinity, no data will be transmitted.

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⚠️ Note: Cables labeled "Charge Only" or "Fast Charge" are not designed to transmit data - even if they are original from Xiaomi. Use a cable from a smartphone kit or a certified one to connect to your TV. USB 2.0/3.0 full-strung.

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2. USB Connection Mode on Xiaomi Redmi: MTP vs PTP vs RNDIS

By default, Android on Xiaomi Redmi uses the Media Transfer Protocol (MTP) to transfer files, but TVs often only support PTP (Picture Transfer Protocol) or do not know how to work with MTP at all.

1. Connect your smartphone to the TV.
2. Swipe down the notification bar on Redmi.
3. Tap on the notification “Charge via USB” (or “USB for file transfer”).
4. Select File Transfer Mode (MTP), Transmission of photographs (PTP) or USB-modem (RNDIS).

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If the "File Transfer" item is not:

• 🔄 Restart your smartphone – sometimes the notification doesn’t appear due to a system glitch.
• 📱 Activate "Debugging by" USB» In Settings → The phone. → Version. MIUI (Tap 7 times, then in Settings → Additionally. → For developers.
• 🔧 Reset the settings. USB Developer menu (Reset configuration) USB).

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Connect the cable to the TV|Check the connection notification|Select a regime MTP/PTP|Reboot the smartphone in the absence of notification|Activate debugging by USB-->

3. TV restrictions: USB OTG and drivers

Even if Xiaomi Redmi is correctly transmitting data in MTP mode, the TV may not "understand" it.

• 📺 Lack of support USB OTG: Many TVs (especially budget) are able to only give data (for example, from a flash drive), but not to receive them from a smartphone.
• 🖥️ Outdated drivers: TVs on Android TV Tizen may not have relevant drivers for modern smartphones.
• 🔒 Manufacturer Blocking: Some Brands (e.g, LG Philips: Artificially restricting the function USB-port.

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How to check for OTG support on your TV:

1. Connect to USB-The port of the TV is a mouse or keyboard — OTG maintained.
2. Check Settings → Devices → USB (on Android TV) or Settings → General → External Devices (on Samsung Tizen).
3. Find a TV model in the manual or on the manufacturer’s website – look for a mention of “USB Host” or “OTG”.

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⚠️ Warning: Sony Bravia 2018-2020 TVs often require manual driver installation MTP You might need a remote control with a button. HOME (Hold it for 5 seconds to enter the engineering menu).

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4.Firmware problems Xiaomi Redmi: glitches MIUI

The MIUI shell is known for USB-connected bugs, especially in versions 12-14.

• The “Connected as a charger” notification does not disappear.
• The MTP mode is turned on, but after 5-10 seconds it is reset to Charge.
• The TV sees the smartphone as an “Unknown Device.”

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Decisions:

• 🔄 Update. MIUI: Go to Settings. → The phone. → Updating the system.
• 🧹 Clear the cache: in Settings → Annexes → Application management → Three points. → Show the system find "Storage" USB» and clean the cache.
• 🔧 Reset network settings: Settings → Wi-Fi → Additionally. → Reset network settings (sometimes resets and USB-configuration).
• 📱 Install alternative firmware: If the problem persists, try Pixel Experience or LineageOS (requires unlocking the bootloader).

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Critical information: MIUI 13.0.4–13.0.6 had a bug that prevented Redmi Note 10/11 smartphones from transmitting data over USB when connected to Samsung and LG TVs. Fixed in versions 13.0.8+ and 14.0.1+.

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If the problem persists after the MIUI update, try to roll back to the previous version via Fastboot. Instructions are available on the xiaomi.eu forum ("Downgrade" section).

5. Alternative ways to connect: if USB does not work

If all attempts are made to USB-The connection failed, use the workarounds:

• 📶 Miracast/Wi-Fi Direct: Wireless Screen Mirroring. On Xiaomi Redmi, turn on Settings → Connection and sharing → Wi-Fi transmission. On your TV, activate Screen Mirroring or Wi-Fi Direct.
• 🖥️ DLNA/UPnP: Transfer media over a local network. Use BubbleUPnP (Android) applications or the built-in Media Server to MIUI.
• ☁️ Cloud Services: Upload files to Google Drive/Mi Cloud, then open them on your TV via your browser or app.
• 🔌 adapter USB-C → HDMI: for screen mirroring (requires support for DisplayPort Alt Mode on a smartphone).

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Wireless methods (Miracast, DLNA) are the most versatile way to connect, but for games or videos in 4K, it is better to use a USB-C → HDMI adapter (if the smartphone supports DisplayPort).

Hardware malfunctions: port, controller, firmware

If none of the methods helped, the problem may be at the level of "iron":

• 🔌 Damaged. USB-Signs: cable is not coming in tight, charging is interrupted when you move.
• 💻 Failure USB-Diagnostics: connect the smartphone to the computer - if it is not identified, repair is required.
• 📟 Damaged firmware on the TV: USB-The port does not work with any devices, although it is physically fit.

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How to diagnose:

1. Check it out. USB-port of the TV with a flash drive (formatted in FAT32). If the flash drive is not read, the port is defective.
2. Connect Redmi to another device (computer, laptop) if charging is the only problem in the smartphone.
3. Test a different cable and port on your TV (if there are more than one).

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⚠️ Attention: If USB-The port on Xiaomi Redmi is damaged, do not use wireless charging as a permanent solution - this can lead to overheating of the battery. ~800–1500₽).

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7. Frequent questions on connecting Xiaomi Redmi to a TV