2017-2019 sportsman 450/570 with eps factory service manual

I have a 2018 450 and the digital gause has started flashing on an off while driving. The backlit also goes on and off. It is worse when I hit the gas. The battery died a few weeks ago and I jumped it but its been fine until last night. Called the dealer and showed them a vid and they recommend replacing the gauge and its like 600 bucks. The machine has less than 100 hours on it. I would really hate to have to change it out. also the unit sometimes has trouble starting. Any ideas?

Hey, how's it going?
I'm a new member looking to get some advice before I go to check out a '14 Sportsman 800.  I wanted to get input from you guys that have experience with Polaris machines. I've been riding my whole life, dirt bikes and atvs... Honda, Suzuki, Yamaha, but never Polaris.  I'm looking for advice on what I should be looking for, any common issues, really any general advice.  I couldn't find many reviews of the Sportsman 800 online, so and general reviews on quality/reliability would be great too.
A little info on the machine. 
-2014 800 EFI
-640 miles, 77hrs.
-Winch
-Asking price is $5500
Couple add ons: (nothing major) 
-Aftermarket wheels with Maxxis tires
-Front and rear brush bumpers
-LED lights
Probably going to see it in the next couple days. I'll make sure to check out all the basics... Fluids, front end, tires, suspension etc.  Plus anything else you guys recommend.
Thanks for any advice on advance! 

Hello,
  Over the years I have always used a friends machine, and only ride a few times a year. Last week I purchased a 2002 Polaris Sportsman 700. The front diff needs a rebuild, the axles are very loose where they go into diff. My question is, both front wheels rotate forward by hand, but do not rotate the opposite direction. Is this "NORMAL OPERATION" I plan on rebuilding the hubs at the same time as the diff.....
 
  My question about the rear diff, it rolls as if the machine has a total POSI rear axle...……. I lifted the front end off the garage floor with overhead hoist, as I moved it sideways the rear tires skidded rather than rotate. Both would roll forward easy, but not go in a circle. When I drove the machine in the garage making a tight turn I could feel the binding and skidding of rear tires....  Even if the switch was in 4 wheel drive, when it's hanging in te air the ignition is off...….. with the machine in 2 wheel drive mode, is that HONESTLY 1 wheel drive to allow turning without tearing up the lawn? then it locks the rear axle once it's put into 4 wheel drive? I'm guessing the rear diff needs a rebuild also because there is something "BALLED UP" internally locking the rear wheels together?
  It's a old machine that was not maintained, I thought the wheels were all rusted, but it was 17 years off baked on red clay. Just wanting to make it a reliable machine. I have great mechanical ability, just lacking a little knowledge of what is suppose to be "NORMAL OPERATING STANDARDS"
 
Thank you in advance for sharing your knowledge.
Jeff

Just got a 2019 570 a few weeks ago, haven’t got much seat time yet but I’m loving it! I’m not new to riding but new to Polaris. I’ve had a few 4wheeler’s over the years, including a Yamaha kodiak 450 and later a Honda rancher 420.

Hey guys, new to the page from Australia. Just wanna know if  anyone has had an alternator charging prob if using an auxillary piece of equipment eg spray unit. New battery, and cant seem to catch the alternator playing up, reads all good on outlet power.Just doesn't keep up the charge only when using spary unit, and headlights are off.....