Disassembly of the Xiaomi Mi TV remote: from battery to chip

Why Xiaomi Mi TV remote may require disassembly?

Remote controls from Xiaomi Mi TVs (including Mi TV 4/4A/4S/4X/5/5X/Q1/Q2), despite their simple design, often fail due to heavy use. Typical problems: button sticking, no response to pressing, battery discharge or physical damage to the case. 80% of cases are caused by oxidation of contacts or wear of current tracks under keys.

Disassembly of the remote may be necessary for:

• 🔋 Replacement of the saturated battery (especially important for models with lithium cells) CR2032 or CR2026)
• 🧹 Cleaning contacts from dust, dirt or liquid residue (if the remote is spilled)
• 🔧 Repair or replace buttons (most often break) OK, Volume+, Home)
• 🔍 Diagnostics of the board at complete inoperability (checking of quartz resonator, chips)

Importantly, Xiaomi’s latest consoles (2022-2026) may have hidden latches or adhesive joints that make it difficult to disassemble. In this article, we’ll look at a universal method that is suitable for 95% of models, including the Mi TV Stick and Mi Box (their remotes are identical in design).

Disassembly tools and materials

For careful disassembly of the remote without damage, prepare:

• 🔪 Plastic blade (or mediator) - to separate the latches
• ✂️ Knife or scalpel - if the body is glued
• 🔧 Screwdriver cross (PH00) — for screws, if any)
• 🧴 Isopropyl alcohol (90%+) — clean-up
• 🧻 Cotton swabs and napkins - lilaless, so that there are no fibers left
• 📸 Smartphone – to photograph the location of details

Attention! Don't use metal tools to detach the body, they leave scratches and can damage the board. If you don't have a plastic blade, an old bank card will do.

If the Xiaomi Mi TV remote does not respond to pressing, but the indicator burns when you press any button, the problem is most likely in the conductive layer under the keys, in which case you will need a special conductive paste (for example, MG Chemicals 8425) to restore contacts.

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Before disassembling, take a photo of the remote on both sides - this will help to properly collect it back, especially if the latches are symmetrical.

Step-by-step: how to disassemble the Xiaomi Mi TV remote

The disassembly process takes 10-15 minutes, follow the instructions strictly in steps, so as not to damage the board or plumes.

1. Step 1: Remove the battery, flip the remote and find the battery compartment, apply the lid with a plastic blade or nail (holding on the latch), carefully remove the power supply. Don't use a screwdriver, it can warp the contacts.
2. Step 2. Disconnect the body: Put a plastic blade in the gap between the halves of the body (start from the battery side). Carefully drive the tool around the perimeter, disconnecting the latches. If the body does not respond, it is glued — in this case warm the seam with a hairdryer (temperature not higher than 60 ° C) and try again. Attention! Mi TV Q1/Q2 models may have a hidden screw under the sticker — check its presence before the power disconnect.
3. Step 3. Remove the board Once the case is disconnected, you'll see a board with buttons and a rubber conductive layer. Carefully raise the board, don't pull the plumes (if any). In some remotes, the board is attached to small screws -- unscrew them with a PH00 screwdriver.
4. Step 4. Check the integrity of the circuit board tracks and the purity of the contacts under the rubber buttons. The oxidation looks like a dark coating, and damaged tracks can be interrupted or blackened. If the contacts are contaminated, clean them with alcohol and cotton swab.

If the remote is still not working after cleaning, the problem may be in the chip or quartz resonator (a small silver part on the board), you will need a multimeter to check them.

Typical problems and their solutions

Once you've taken the remote, you might encounter a few common malfunctions, and here's how to fix them:

If the rubber buttons have lost their elasticity or the conductive layer has been erased, they can be restored in two ways:

• 🔄 Temporary repair: apply conductive glue to the back of the button (e.g. Permatex).
• 🆕 Permanent solution: order a new rubber layer (article for Mi) TV 4X — MDZ-22-AB).

Attention! Don't use superglue to fix the rubber layer, because it can damage the conductive coating, but you'd better put the buttons on the edges with double-sided tape.

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If the remote has fallen into water, it must be disassembled and dried for at least 48 hours in rice or silica gel. Do not turn it on immediately after drying - residual moisture can cause a short circuit.

How to collect the remote back: tips and mistakes

Building a remote is as responsible as disassembling.

• ❌ A skewed board - leads to button clamping.
• ❌ Incorrectly installed rubber layer – buttons will be pressed with difficulty.
• ❌ Closed battery compartment before check - if the remote does not work, you will have to disassemble again.

Assembly order:

1. Lay the rubber layer on the board, combining the holes for the LED and buttons.
2. Make sure that all buttons are freely pressed (without jamming).
3. Combine the halves of the body, starting from the side of the battery compartment.
4. Carefully press the body until the snap of the latches (do not slap your palm!).
5. Insert the battery and check the performance of all buttons.

If you don't push or fall through the buttons after you build, you've got a curve on the rubber layer, and you take the remote and you repeat the steps, focusing on the centering.

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After assembly, check the remote at a distance of 5-6 meters from the TV. If the signal is weak, clear the IR port on the TV from dust (it is under the screen).

What if the remote does not work after repair?

If after all the manipulations, the Xiaomi Mi TV remote does not respond, perform the algorithm diagnostics:

1. Install a new battery (even if the old one seemed to work). Measure the voltage with a multimeter - it should be at least 2.8 V for the CR2032.
2. Test the IR signal, point your smartphone camera at the LED remote and press any button. If there's a signal, you'll see a flicker (IR beams are visible through the camera). No flicker means the LED or chip is malfunctioning.
3. Sometimes the TV forgets the paired remote. Go to Settings → Bluetooth and devices → remotes and do the pairing again.
4. If the remote is warming or the battery is quickly setting down, the board may have a KZ. Check it under the magnifying glass for blackened tracks or bloated capacitors.

If the diagnosis didn't work, the chip probably malfunctioned, and it's cheaper to buy a new remote control (the original one for Mi). TV worth ~1500–2000 ₽), than to repair the old.

Alternative ways to control the TV without a remote

While the remote is in repair, you can control the Xiaomi Mi TV in alternative ways:

• 📱 Mi Remote (available for Android and iOS) via Bluetooth or Wi-Fi. Important: TV and smartphone should be on the same network.
• 🖱️ USB-A mouse or a keyboard. Connect them to the keyboard. USB-TV port - cursor will appear on the screen.

If you are using Mi Remote but some buttons are not working (such as Netflix or Prime Video), upgrade to the latest version of the app. You can also customize the buttons to your needs in the application settings.

Attention! When you control via a smartphone, there may be a delay (lag) of up to 1-2 seconds, which is normal and involves processing the signal over Wi-Fi.

FAQ: Frequent questions about the dismantling of the Xiaomi Mi TV remote