Taylor precision digital diet scale model 1250-49 displays "88888",theno "UNSt" , even when level and solid platform

Try the Factory Reset. Did you try cutting power to it for an hour?

Page 80-81

https://www.manualslib.com/manual/1438801/Seca-676.html?page=80#manual

https://www.google.com/search?q=Seca+676+Platform+scale+display+shows+88888

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Question edited for clarity.
Question moved from Watches category.

"batteries - them " Plural? It only takes 1 battery. Look

7517 Glass Electronic Scale

Features

• Glass Electronic Scale.
• 1.2" digits in a 1.6" LCD readout.
• High tempered 8 mm thick glass platform.
• Silvertone base and brushed stainless steel accents.
• UV glue attaches platform to base for a clean look.
• Instant on, auto zero, auto off, low battery indicator.
• High capacity 440 lb x .2 lb / 200 kg x .1 kg / 31 stone 6 lb x .2 lb.
• 1 CR2032 lithium battery included.

And Polarity is the positive + flat side towards you.

http://taylor-enviro.com/weight-management/glass-electronic-scales/glass-electronic-scale-7.html

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Try a new battery. If that doesn't fix it, return it to Taylor under Warranty.

Digital Scales - Taylor USA

www.taylorusa.com > collections > digital-scales

Digital Bathroom Scale with Natural Bamboo Platform. Shop Now. Digital Glass Bathroom Scale with Backlit LCD Display. Shop Now ...

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The battery has numbers on it, search those numbers

it means that it can't get a 0 point because it is unstable put it on a flat table or something and push re-zero (softly)

"unk"

Turn it over - take out battery and check with multimeter to ensure it is still workable - let sit for 10 to 15 seconds - replace battery - set it on level surface and step on and back off. Step on it again and it should now work.

Hello, Maclay55 -

I hope you checked the owner's manual first, the troubleshooting / problem solving section.

It wouldn't hurt to put new batteries in the scale (2 AAA batteries).

Note: From the instructions for the scales:

6. Do not store scale where you store cleaning chemicals. The vapors from some household products may affect the electronic components of your scale. Do not store scale on its side.

7. This scale is an extremely sensitive weighing device. In order to prevent run down of the battery, do not store anything on the scale.

8. Do not dispose of batteries in fire. Batteries may explode or leak. Do not mix old and new batteries. Do not mix Alkaline, carbon-zinc (standard) or Nickel-Cadmium (rechargeable) batteries. Remove the batteries if the scale will not be used for a long period of time.

Source:
1037BL The Biggest Loser by Taylor Stainless Steel Platform Scale Instruction Manual, pages 4-5
http://taylor-enviro.com/media/IBs/1037BL_ib.pdf

If installing fresh batteries does not work, then I suggest you call the Taylor USA Consumer Help & Support department. This is the link to the web page with the US and Canadian telephone numbers:
http://taylor-enviro.com/taylor-support/

Best wishes.

Try a new one. If it works, the scale is broken.