No sync crt Tv

[Dav.p]

I need some help 'cause Italian NG or formus doesn't help me much..
Many years ago i've much probably caused a damage to a Daewoo DTG2997 crt Tv (chassis C1000)
connnecting a computer to it, one 12v may have been connected for error to the ground and came in
to the tv through the RCA video/audio cable's ground, now AV inputs, apart antenna, doesn't work
well, if i put a RGB signal through the SCART AV cable the image is visible but without any sync,
if i put a videocomposite signal the screen is empty/dark (dark grey), so i don't understand why
antenna video signal is displayed well and other inputs not.. (i'm not an expert).
theese are the relevant pages of schematics:

http://img148.imageshack.us/img148/3738/c1000pg10.jpg
http://img600.imageshack.us/img600/6532/c1000pg1.jpg
http://img24.imageshack.us/img24/1968/c1000pg2.jpg
http://img851.imageshack.us/img851/5985/c1000pg3.jpg
http://img834.imageshack.us/img834/9867/c1000pg8.jpg

Many thanks in advance.

 

[Dav.p]

The obvious place to start is at the sync input pin on the SCART

connector. From pin #16, it becomes P/S on connector PV04

From there, I kinda ... lose it on the schematics.
I'm assuming, here, that SCART doesn't use sync-on-green
signalling, but uses the 'blanking' input in the form of
a 'sandcastle' signal (i.e. sync plus blanking info).

Thank you, for now i comment what i understand..
so you say that P/Sw is used as a sync input (+blank)?
i don't knew it well... so maybe the faulty part is only that
signal? Since i have made an error on reconnecting cables to Crt,
(i have connected a 2 little wire connector with a X-ray signal on it (??)
with an empty socket, there was 2 empty sockets, on the PSU, with
the optional function of a P/C signal for switching on PSU from mo.bo.)
tv now seems to have one more problem, i hope i solve this soon,
for now i need to know, the RGB input from scart card goes on the teletext
card to be MUXed with TEXT rgb signal, to avoid a problem to the Mux,
i have connected with wire the scart rgb IN with the out in this same card,
also the signal named F/Sw (?? before was P/Sw), in the out connector near
P/Sw (named only Sw) there is a signal Sh, is this a sync signal also?
BYE.