Touchscreen not working, is there a reason why?

You need to install the touchscreen driver from here: http://www.lcdwiki.com/4inch_HDMI_Display-C Scroll down to "How to use Raspbian/Ubuntu Mate/Kali/Retropie system"

When i first used the pi 4 screen, i connected the raspberry pie. raspberry pi 4 touchscreen flickered and didn't display. what should i do?

Make sure you read the instructions about the screen as it is not fully plug and play. It will flicker on and off a few times while being detected and there is a driver you will need to install to rotate the screen and set the resolution but it is all in the setup guide. If you did not get a setup guide, go to the website for the manufacturer and download it from there. Just be aware, this id a DIY device and setting this up may impact usability of other default monitors like it has for me.

Can I install drivers alone on my RasPi4b build without a complete new image - if so where is link?

Seller gave me instructions to install driver on an existing image within 2 hours of my email. Amazon rejects my reviews and replies if I try to post them. Be aware that there is no way to REMOVE the driver without installing a new image, also verified by seller who states they’re working on an uninstall.

I am looking at using this as a portable unit, with no power cord and battery use only. What battery would be recommended?

Miuzei raspberry pi 4-inch touchscreen power consumption is 5V 0.16A. It's recommended to use a lithium battery as power storage(NOTE: conversion between power storage and release )

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Miuzei Raspberry Pi 4 Touchscreen with Case Fan, 4 inch IPS Touch Screen LCD Display, 800x480 HDMI Monitor for RPI 4b 8gb/4gb/2gb with Touch Pen (Support Raspbian/Kali/Octopi/Ubuntu)- No Raspberry Pi

Miuzei Raspberry Pi 4 Touchscreen with Case Fan, 4 inch IPS Touch Screen LCD Display, 800x480 HDMI Monitor for RPI 4b 8gb/4gb/2gb with Touch Pen (Support Raspbian/Kali/Octopi/Ubuntu)- No Raspberry Pi

Product ID: 258963189

Details

Aspect ratio
16:9
Brand
Miuzei
Resolution
SVGA Wide
Screen size
4 Inches
Screen surface description
Glossy

⚡60 FPS refresh rate

📺4-inch IPS full-angle display

❄️Active cooling with fan & copper heatsinks

Description

🔥 Elevate your Raspberry Pi game with the ultimate 4-inch touchscreen companion!

SLEEK PROTECTIVE CASE - Show off your setup with a stylish, transparent case that doubles as passive cooling and robust protection.
VIVID 4 INCH IPS DISPLAY - Experience crystal-clear visuals with 800x480 resolution and wide viewing angles—perfect for on-the-go pros.
INTEGRATED COOLING SYSTEM - Stay cool under pressure with dual copper heatsinks and a 30mm fan ensuring optimal Raspberry Pi 4 performance.
PLUG PLAY TOUCH CONTROL - Effortlessly interact via sensitive resistive touch with pre-installed drivers for Raspbian, Kali, Ubuntu, and Octopi.
SMOOTH 60 FPS REFRESH RATE - Seamlessly stream videos, play games, or monitor systems without lag or stutter.

The Miuzei 4-inch IPS touchscreen is a compact, high-performance monitor designed specifically for Raspberry Pi 4 models (2GB/4GB/8GB). Featuring an 800x480 resolution at 60 FPS, it supports HDMI input/output with audio, and offers precise resistive touch functionality compatible with major OS like Raspbian and Ubuntu. The included transparent case, copper heatsinks, and cooling fan ensure your Pi stays cool and stylish during intensive tasks, making it ideal for portable projects, gaming consoles, and real-time monitoring.

Specifications

ASIN	B07XBVF1C9
Additional Features	Touchscreen
Aspect Ratio	16:9
Best Sellers Rank	#155,061 in Computers ( See Top 100 in Computers ) #3,487 in Computer Monitors
Brand	Miuzei
Brightness	m2
Color	orange
Compatible Devices	Computer
Connectivity Technology	HDMI
Contrast Ratio	2000:1
Customer Reviews	4.1 4.1 out of 5 stars (1,128)
Display Resolution Maximum	800*480 Pixels
Display Technology	LCD
Display Type	LCD
Hardware Connectivity	HDMI, Micro-HDMI
Has Color Screen	Yes
Is Electric	Yes
Manufacturer	Miuzei
Model Name	MC21-4
Model Number	raspberry pi 4 monitor
Mounting Type	Desk Mount
Native Resolution	800*480
Number of Component Outputs	2
Picture Quality Enhancement Technology	No Specific Technology
Processor Count	1
Refresh Rate	60 Hz
Resolution	SVGA Wide
Screen Finish	Glossy
Screen Size	4 Inches
Shape	Rectangular
Specific Uses For Product	Multimedia
Total Number of HDMI Ports	1
Total USB 2.0 Ports	1
Total Usb Ports	1
Viewing Angle	178 Degrees
Voltage	5 Volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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