I found the same problem.
I bought Samsung T260 HD HDTV monitor to use as a extended monitor for my VAIO laptop (PCG-7A2L).
I was able to connect with another VAIO laptop (PCG-9P6L) and APPLE MacBook Pro.
I tried different monitor cables.
Still no signal on Monitor.
I called SONY and the tech suggested to install all updates.
And I still get "Weak Signal, No Signal".
I wonder if you (DavidZ113) ever figured it to work ??????
I recently purchased a Samsung T260HD HDTV monitor. I bought it to serve as a monitor for my Sony Vaio laptop (VGN-FJ270). However, when I connect my vaio to the monitor through vga, the monitor receives no signal. I have tested my vaio with other monitors, and there is no problem getting a signal there. Also, I have tested the monitor with two other laptops (a Dell and a Mac), and it works perfectly well with those computers.
I have seen various threads about problems people have had with some Sony laptops and Samsung monitors. I downloaded and installed the latest BIOS version and the latest Sony Utilities DLL and Vaio Event Service programs. I am not sure what else there is to do. I hope there is a way to fix this problem. Thanks in advance for any help you can offer.