Electronics > Beginners

My Fluke 289 displays "warning leads connected incorrectly" after the case open

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Binhnt:
Hello eevblog members,

I am new to this forum.
Somebody please help as  I have a big problem with my used fluke 289 that I bought from ebay recently.  :-[
At first it worked nicely. Then last days, i decided to check what inside with curiosity.  :-/O
After openning all, even unplugging the LCD cable to check and clean dust If there was any, I put them back together as easy as I could. Nothing special to say, but the probelm came when I turned it on after that, it only displayed the error warning message of "Leads connected incorrectly" together with the chirping sounds.  |O
I am stucked at this step from then, no way to use the meter any more. :-//
Some one has experienced this, please help to advise me what to do ?
Your inputs are really really appreciated.

plesa:
Try to clean area bellow banana sockets. I suppose that 289 has optical detection of leads.

retiredcaps:
Check your input jacks for dirt/debris.

https://www.eevblog.com/forum/repair/fluke-189-teardown-repair/

https://www.eevblog.com/forum/reviews/fluke-287-input-alert-diode-type-replacement/

Binhnt:
Thank plesa and retiredcaps for your suggestions, I already did try to clean the jacks and the sensors.
I may try one more time with the cleaning.
Is there any error with the board or the way i put them back together that might cause the bad result like that ? Maybe something was disconnected unexpectedly ? I am so sad that such thing can happen easily to a good product like this.

retiredcaps:

--- Quote from: Binhnt on August 20, 2015, 05:01:59 am ---Is there any error with the board or the way i put them back together that might cause the bad result like that ? Maybe something was disconnected unexpectedly ?

--- End quote ---
Try another cleaning.  If it doesn't solve the problem, post clear focused pictures of your pcb and maybe we can spot something.

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