Question about Fluke Networks Fluke T5 600 Elec. Tester Flat

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My Fluke T5-600 won't read AC voltage. Everything else works, it's just when you try to read voltage the display goes blank and the red light comes on.

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Posted on Oct 14, 2013


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Posted on Jan 02, 2017

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SOURCE: Cannot get my Fluke 36 clampmeter to read amps

1. make sure that all buttons can be pressed freely (not stuck)
2. make sure when measuring AC current that you press AC button and AC sigh is on LCD
3. make sure that jaws are closed completely
4. clamp meters use Hall effect and can only measure current flowing through ONE conductor (you cannot measure current around power cord (which has 2-3 or more conductors)
5. when in DC setting and you turn zero knob does value changes (it should)

Posted on Nov 28, 2011

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Blank Display, using exernal monitor, can see display info w/flashlight, display flashes light at startup

You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:

  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out for parts, repair service and DIY info.

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