I have a problem, no matter i turn the battery on, EXT PWR and/or APU, the CRT's PFD and EICAS are black, in cold and dark cockpit this is. If i load the airplane normally with the engines running and pretty much everything working properly, the CRT's die black about 30sec to a 1minute or so. Can canybody help me here?!?! Please!!!I spent a #### lot of money and time on this product and studying!Thank you very much for you help and attention.Regards to all,Henrique Oliveira

Henrique,This sounds like a case of erroneous validation. Reinstall the 744 and make sure the software is successfully validated. Hope it helps,

If all else fails, please send our support team an email with your order number so we can take a look and assist with the validation process.