The slide on the diva does not dim anymore - what happened?

The power supply for the led's may not be dimmable. Not sure if this dimmer is for led but I assume that's why you bought it.

Transformer hum with dimmers is a problem. Lutron may offer you an inductor to add to the wire to help. Replacing your 50w bulbs with 12w LED bulbs may help, too. Same light output.

get metal pot

This is probably normal. If you are using LED bulbs try a different brand. I think you will find the dimmer the setting the longer the delay.

you mean uninstall,, control panel find your eicon diva software push uninstall

Which dimmer do you have. So I can look up the manual.
Are you using a fan dimmer, or light dimmer?
Does the dimmer feel warm to touch? or hot?
What does the dimmer control? Incandescent? Fluorescent?
How many total watts are being dimmed?
Is this a new dimmer or old dimmer that started having a problem?
Add a comment with as much detail as possible for best available answer.

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The Electronic control has lights inside for the time and for the temperature. Over time the lights get dim (Frigidaires do it a lot). The Electronic control is not a Servicable part. You must buy a new Electronic control.

Software Download Listing this should help

First of all, in general, dimmers (even at their highest setting) cause the lights to dim even a little bit. If you are doing a 1-for-1 comparison, you may notice a difference - but honestly, it shouldn't be THAT dramatic that you're able to notice it.

My first suggestion is to double-check the model number. There's a version of Diva with a "G" in the model number (DV-603PG-) which was designed with a lower-high-end light level than normal (designed to guarantee extra energy-savings).

If the model number checks out, my next suggestion is to upgrade to a spec-grade product (like an NT-600-WH). The commercia/specification grade products have a higher high-end than the residential grade products. It still will dim the lights a little bit, but will be better.

After that, I suggest calling tech support at 1-800-523-9466 for more suggestions. Its a free call and they're available 24/7.

All your wiring looks good. Many times dimmer just have problems and are faulty. You should note that the dimmer can only handle 600 watts. If you have that or more on it, than you have probably fried the dimming mechanism. In either case the dimming mechanism is not working properly and you will have to take it back and get the same dimmer or a different one. Tell the store they sold you a faulty dimmer and you can get a replacement at no cost.