--- product_id: 104267528 title: "1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm" brand: "comidox" price: "AED 74" currency: AED in_stock: true reviews_count: 11 category: "Comidox" url: https://www.desertcart.ae/products/104267528-1pcs-20-24-pin-lcd-computer-pc-power-supply-tester store_origin: AE region: United Arab Emirates --- # LCD display for multi-parameter readout Accurate voltage ±0.01V Automatic buzzer alarm for faults 1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm **Brand:** comidox **Price:** AED 74 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your PC diagnostics with precision and speed! ## Quick Answers - **What is this?** 1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm by comidox - **How much does it cost?** AED 74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/104267528-1pcs-20-24-pin-lcd-computer-pc-power-supply-tester) ## Best For - comidox enthusiasts ## Why This Product - Trusted comidox brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Portable:** Sleek 126x64x18.5mm design fits perfectly in any tech toolkit. - • **Instant Fault Alerts:** Buzzer and flashing display catch issues before they cause downtime. - • **Plug & Play Simplicity:** No tech degree needed—just connect and get instant, clear diagnostics. - • **Universal Compatibility:** Seamlessly tests ATX, BTX, ITX, TFX, SATA, PCI-E, and more. - • **Precision Voltage Insight:** Pinpoint power supply health with ±0.01V accuracy on all key rails. ## Overview The Comidox 20/24 Pin LCD Power Supply Tester is a compact, versatile device designed for professional and enthusiast PC builders. It delivers precise voltage readings (±0.01V) across multiple power rails and connectors, including ATX, BTX, ITX, TFX, SATA, and PCI-E. Featuring an intuitive LCD display and an automatic buzzer alarm, it instantly flags power supply faults, helping you avoid costly hardware failures. Lightweight and easy to use, it’s the essential tool for anyone serious about reliable PC performance. ## Description Specifications: Material: plastic + aluminum alloy Size: 126x64x18.5mm/4.95x2.51x0.72inch Weight: 120g Operation method: A. Plug the power supply 20PIN or 24PIN and P4, P6 or P8 into the corresponding position of the power tester. (If you plug in the 20PIN or 24PIN interface tester alarm and display LL, you need to plug in 4P! Please look for 4P must be inserted in the 4P position!) B. Turn on the power and “drip” sounds two sounds. If the values of each group are not flashing, it means that the power input is normal. C. If a circuit voltage signal is not detected (such as a 20PIN or 24PIN connector) or the detected voltage is out of the normal range, the buzzer will sound a "drip" warning for a long time, and the corresponding voltage or PG value will be displayed. If the status is flashing, it means the power supply is faulty! Note: The +3.3V light plugged into the SATA interface tester is not lit because the power SATA interface has 4 wires and 5 wires. First, make sure that your power SATA interface is 4 wires or 5 wires. If it is 4 Line, that is no +3.3V output, only 5 lines have +3.3V output. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 1Pcs Review: Great device. Works. A must have. Amazing price for what you learn. - Hey! This works! I replaced the power supply twice on a gaming mother board that would intermittently boot. Everything I read online said "PSU is bad." Fed up, I bought this. My PSUs checked out and passed the tests. Long story short, my motherboard was bad. So now I have extra PSUs. But for the price, this is worth every nickel and more. Review: I know it's not the best..but does the job!! - I do need a smart helping hand and found ths!! I just do not care for digital equipment..but this is what I could find without looking for something all day and waiting three-eight days for delivery!! It's getting harder and harder to find something that won't cost an arm and a leg and will do the same thing a big box can do when you are in a hurry!! ## Features - The LCD power tester is a powerful power test device. This power tester only needs to be connected to the ATX connector of the power supply to easily and intuitively know whether the output of each power supply is normal. It can detect ATX, BTX, ITX, TFX computer power supply, and can display various voltage and PG values in liquid crystal to quickly detect the performance of computer power supply. - The LCD displays various parameters such as output voltage and PG. When each parameter exceeds the normal value, the buzzer will sound a warning and the corresponding value will flash. - It can measure the voltage of each group of power supply 3.3V/+5V/+12V/-12V/SB+5V/PG, and also measure the output wire P4/P6/P8/SATA/IDE, external DIE/SATA/P6/P8 is the light Displayed, there is no LCD voltage. Only the 24pin or 20pin will have the LCD voltage. - It has LCD intuitive and accurate display voltage (+/-0.01V), automatic fault alarm, complete test interface, small and beautiful appearance, and many test functions. It is the best choice for quickly detecting PC power. - Support 20Pin, 24Pin ATX interface / SATA interface / 4Pin, 8Pin interface / PCI-E graphics card 6Pin interface / floppy drive interface / ATE hard disk interface. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07J9LRC6T | | Best Sellers Rank | #199 in Computer Power Supplies | | Brand | Comidox | | Brand Name | Comidox | | Color | Black | | Compatible Devices | Personal Computer | | Customer Reviews | 4.5 out of 5 stars 478 Reviews | | Manufacturer | Comidox | | Measurement Type | Voltmeter | | Part Number | CP218 | | Power Source | Corded Electric | | Style | Compact | | Style Name | Compact | | UPC | 661083376484 | | Unit Count | 1 Count | ## Product Details - **Brand:** Comidox - **Color:** Black - **Measurement Type:** Voltmeter - **Power Source:** Corded Electric - **Style:** Compact ## Images ![1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm - Image 1](https://m.media-amazon.com/images/I/41KJrJQZFxS.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great device. Works. A must have. Amazing price for what you learn. *by P***M on May 15, 2026* Hey! This works! I replaced the power supply twice on a gaming mother board that would intermittently boot. Everything I read online said "PSU is bad." Fed up, I bought this. My PSUs checked out and passed the tests. Long story short, my motherboard was bad. So now I have extra PSUs. But for the price, this is worth every nickel and more. ### ⭐⭐⭐⭐⭐ I know it's not the best..but does the job!! *by G***Y on July 6, 2026* I do need a smart helping hand and found ths!! I just do not care for digital equipment..but this is what I could find without looking for something all day and waiting three-eight days for delivery!! It's getting harder and harder to find something that won't cost an arm and a leg and will do the same thing a big box can do when you are in a hurry!! ### ⭐⭐⭐⭐⭐ Great tool to have in the tool box. *by R***B on February 5, 2026* Very handy little tool. Easy to use, just "plug-and-play". Diagnosed an old HP computer that failed because the power supply has a bad 12V rail. It reads "H.H" which means High Voltage / Overvoltage / Unsafe High Voltage. This would be the reason the CPU and motherboard failed! The HP proprietary power supply killed them! Thanks, HP! If you have ever had a PC component (or an entire PC) fail or break down and wonder if the power supply failed and killed it, this can help and is a whole lot cheaper than buying a whole new power supply, or will tell you if you definitely need to replace your power supply unit. Very handy to be able to diagnose this kind of thing from home! ## Frequently Bought Together - Comidox 1Pcs 20/24 Pin LCD Computer PC Power Supply Tester for ATX BTX ITX TFX SATA with Buzzer Automatic Alarm - Zhushan Wire Crimping Tool for Dupont, Molex, JST Terminals AWG24-16 (0.25-1.5mm²) - Professional Wire Crimper and Molex Crimper - Klein Tools 11061 Self-Adjusting Wire Stripper / Wire Cutter, Heavy Duty, for 10-20 AWG Solid, 12-22 AWG Stranded, and Romex Wire 12/2 and 14/3 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ae/products/104267528-1pcs-20-24-pin-lcd-computer-pc-power-supply-tester](https://www.desertcart.ae/products/104267528-1pcs-20-24-pin-lcd-computer-pc-power-supply-tester) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-08-15*