SainT

It doesn't work with BJL as far as I know...

I have one Jaguar, looks fine, it crashes randomly on some carts and not others! Cosmetic appearance does not necessarily have any bearing on functionality. I would see if you can get the cart swapped with DragonBox initially saying you've been chatting with me about the issue. If you get the same behavior, it's the console. I've had far more issues like this where the console is at fault than the cartridge, however I would never rule out a hardware issue with the cartridge either. While they work fine when they leave me, there certainly have been some cases (I think just one) where the cartridge has been the problem.

Hanging here is usually a sign of a bad connection / badly behaving EINT0 and EINT1 pins on the cartridge port. The fact it's no longer hanging on the RetroHQ splash screen indicates to me there was a bad connection on the UARTO and UARTI pins of the cartridge port. So I'm guessing while cleaning has helped, it has not solved all connection issues. Quite why it's red screening intermittently though, I'm not sure -- it doesn't make much sense. This would be a bad connection on the data or address lines, but given games are running, this doesn't seem to make any sense.

Agreed. I'm slightly cavalier in my approach at times. 😆

Stock is more limited to the UK due to the much smaller market. But that said, I have a few more which will be going out to UK suppliers shortly. I also have no control over where UK stock ends up, unfortunately. I'm pretty sure the majority of the UK stock ends up going out of the country, which essentially makes local suppliers largely pointless to me. There is also DragonBox in Germany which gets more stock than the UK, but also less then the USA. Given the stupid Brexit arrangement importing from the EU isn't really any better than the rest of the world, now, so I see DragonBox as my EU supplier. Although, again, I'm sure stock goes all over the place. Until the demand is largely met the ability to buy locally is going to be frustrating.

If you want to buy from the UK, use a UK retailer. They are listed here -- https://www.retrohq.co.uk/products/atari-jaguar-gd-flash-cartridge

Unfortunately it could be the Jaguar, or it could be the cartridge. The easiest way to check would be to try another Jaguar or another cartridge. It’s worth trying a replacement cartridge if you can, if you get the same problem, then you know it’s the console.

Lol, you'll need something mildly abrasive and able to absorb some IPA. Something like cardboard would do the job, I would think. It needs to physically rub away any corrosion. On the cart edge you'd use something like a fiberclass pen, but it's trickier to get at and see what's going on with cartridge edge connectors like this.

The ideal thing to do here is to test it on another Jaguar. There are two options -- The signal from the Jaguar is not making it to the cart. The cart is faulty. If another Jaguar isn't an option, if you can get an oscilloscope or signal probe on the EINT0 and EINT1 lines and check for activity at the cart pin when you try and load a ROM from the menu. It doesn't switch to this type of loading until this point. If you see signals but the cart is not loading, there must be an issue with the cart. And you are getting NO MOVEMENT AT ALL on the loading bar, right? I just want to be clear on this, as some movement indicates a different issue.

I will sometimes use a fine sandpaper (I'm sure I'll get flamed for this 😆), but just some card or something reasonably thick with IPA should do the job.

Check EINT0 and EINT1. Oddly enough looking closely at the cart port there does appear to be white residue on the connector plastic and pins around where those pins are located.

This is a common problem when one of the interrupt pins on the cartridge port is bad. Have a very close look at your cartridge port for any damaged pins or corrosion. There have even been issues with corroded / broken traces on the console PCB, so while the cart port looked fine there were issues elsewhere. Unfortunately the GameDrive cart uses several more pins on the cartridge port than a normal game cartridge, so while original game cartridges may work fine, it does not guarantee the console is in perfect working condition.

Do you have a JagLink connected? Hanging here is normal if the comms port is being blocked. The red screen is a bad connection on the cart port, and your cart port doesn't look in the best of shape. There's rust on the screws which hold the connector to the casing, although I don't obviously see any bent pins. The JagGD also uses more pins on the cart port than regular games, so other games working isn't a foolproof way of determining if your cart port is in good shape, unfortnuately. If you dont have a JagLink, a good clean and inspection of the cart port would be the first stop.

They have had limited stock already, they will get a few more shortly, then more again in about 6 weeks.

As said, it's already happened. Grab an update and go play! Have a look in the support thread for more useful information -- https://atariage.com/forums/forum/247-jaguar-gamedrive-support/