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Black plastic AT power-supply tester with 20/24 pin, SATA and other connectors, green LEDs

And 1

And 1 AT Power Supply Tester LED 20/24 pin SATA

SKU CH-0N0S-Q0138

Tests 20/24 pin ATX power supplies with LED indicators for SATA and other connectors

  • TypeAT
  • Quickly diagnose PSU faults with green LED pin indicators
  • Checks voltage on every wire to confirm proper function
  • Essential technician tool for first-step computer troubleshooting
  • Simple plug-and-read operation with on-device instructions
  • Tests 20/24 pin ATX plus SATA and other connectors

Diagnostic Tool for AT Power Supplies

This And 1 tester checks voltage on all wires of an AT power supply to confirm it is functioning properly. It is built for computer technicians and builders who need to quickly diagnose or rule out PSU faults before replacing other components. Green LEDs illuminate for each pin receiving power when connectors are plugged in. The unit includes a detailed operation guide printed on the product.

Replaces Manual Multimeter Checks

The tester replaces slow, probe-based voltage measurements with a direct plug-in method that shows live pin status at a glance. The jump is worth it when troubleshooting boot failures, random shutdowns or drive errors where the power supply should be the first item checked. It supports 20 or 24 pin ATX connectors plus Floppy, HDD, CDROM, SATA, 4 pin P4, 8 pin Dual CPU and 6 pin PCI-Express connectors. No external power source is required.

Sustained Use Behaviour

Under continuous load the tester simply passes supply voltage through its LEDs, so its own thermal behaviour is negligible and it does not alter the PSU output. The sturdy plastic housing weighs 71g and contains no active cooling or moving parts that could wear out. It is not suited for automated production-line testing or for logging voltage ripple over time. Buyers who need data logging or remote monitoring should look elsewhere.

Highlights

  • Quickly diagnose PSU faults with green LED pin indicators
  • Checks voltage on every wire to confirm proper function
  • Essential technician tool for first-step computer troubleshooting
  • Simple plug-and-read operation with on-device instructions
  • Tests 20/24 pin ATX plus SATA and other connectors

Specifications

TypeAT

Questions about this item

Which connectors does the 20/24 pin AT power supply tester accept?

The tester accepts 20/24 pin ATX, 4 pin P4, 8 pin dual CPU, 6 pin PCI Express, SATA, floppy, HDD and CDROM connectors.

What is the step users often miss when installing the tester?

Users often forget to switch the power supply on after plugging every connector into the tester before reading the LEDs.

When should the 71 g tester be replaced?

Replace the tester if the green LEDs no longer illuminate on known good rails or if the plastic housing shows cracks.

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