An update (a long message but I hope it is useful to people needing replacement parts).

Since my last message I did something stupid: I removed the bezel from the display itself to try and push the flat cable, suspecting a bad contact on the lcd side.

Well, the flat cable is extremely delicate (either that or I'm extremely clumsy), and while manipulating it I really broke it (the screen still worked, with the black lines, but the touch sensor didn't).

I contacted Nokia Spain through their online form to know where I could get my tablet repaired......and I'm still waiting for a reply.

Meanwhile I started looking online for a replacement screen. Tessco was out since they don't sell to end users.

I found one at a local online shop (impextrom) for 77€ plus shipping (8€) plus VAT, for a grand total of 98€. Their page showed that they had the display in stock.

I also found it at mytrendyphone, for 96€ plus VAT, but they have a price match option, so I told them I found it cheaper.

In a couple of days they lowered the price to 75€ plus VAT, but since the VAT is higher there (25%) than here (16%), I ordered from impextrom anyway.
Next day they told me that they have no stock and cancelled my order . I asked if they were going to have more stock...and I'm still waiting for a reply.

Meanwhile, even if I don't understand german, I checked the german page of mytrendyphone (meintrendyhandy), since the vat is somewhat lower in Germany. and I placed my order there.

For a strange glitch they didn't charge me neither the VAT nor the shipping (maybe because I chose the option to show the prices without VAT), though they charged a 2€ fee for paying with credit card. I told them I found it strange that they didn't charge VAT but they told me it's ok (it's sure it's ok for me).
I ended up paying 77€ total for the display.

It turns out they're based in Denmark (they sent the screen from there).
The order tracking page didn't work form me, neither in the german nor in the uk site, I had to use the danish or norwegian site to get a tracking number.

They sent it the same day by mail and it took a week to arrive.

It arrived today, they sent it in a simple padded envelope with very little bubble wrap inside, no box, not even a piece of cardboard to protect it from bending, nevertheless it was in good shape, I fitted it and it works.

Now I have a new, shiny, display, I hope it lasts more than the old one.

They also have the display for the n810 and other spare parts, just search n800 or n810, so check them if you need some spares....and click on the option to show prices without VAT