The blue light on bottom is constantly on.
The green charging lampe ist flashing.
Sadly i think your battery has failed due to being fully discharged. Leave it charging to be sure.
Bummer. I agree with LH, at this point your best shot is probably leaving it charging (or trying to) in the hopes of unlocking the battery pack.
This can be a fatal event, hopefully not. The problem is such packs depend on careful and exact balance between the two cells selected to make each pack. They need to be nearly identical so that over time the weaker one doesn't get battered since the Solo only looks at the total of the two to decide charging. It depends on the protection PCB to 'lock out' the pack should one cell or the other be too deeply discharged (this is independent of the normal charging, it's like a fuse of sorts. When this (pack lock out) happens there's still a very small current allowed through (or you could never unlock the pack in the first place). A good cell should eventually recover enough to start normal charging but might not happen if the cell was 'on it's last legss'.
I'm more concerned since this is a new model. Where is 'use while charging'? Something else may be going on........
edit2:
just opened the device.
what is this white stuff ?
That white stuff, if I'm seeing it right, is trouble. It should not be there and there are very few places it can come from. The battery pack itself seems sound? That is it's not leaking (a sure sign it's packed in and needs replacement)? Check carefully. Otherwise IIRC that's the corner of the board with the charging circuit, right next to the power jack. Any chance it got set in water or something and outside contamination got in and we're not looking at a hardware failure?
Anyway, I'd try to see if you can start up (but not heat) with the charger running. And I'd give it a day or so trying to charge to see if I could unlock the battery pack. I would not simply order another battery pack and expect to plug it in an run fine without further testing of the charge circuit and individual cells in the pack (something likely not possible here).
Past that I'm afraid I'd recommend warranty claim if possible and replacement if not. It's the only way to be sure to come up with a working Solo otherwise. If you had, or knew someone with, another working Solo you could swap battery packs and know right away what the story was?
Good luck, but I would not bet on a new battery being your salvation. This Solo could have a charging circuit that's lying to you, it might not really be trying to charge at all, the flashing light being only an indicator of intent, not confirmation of success in charging......
OF