Matsonic MS7308E (MBMS7308E) Motherboard "ms7188d" Questions

MATSONIC MS7188D no video The motherboard can not give video.....The last time that I hear about the problem somebody tell me to short it out one of the pins into the motherboard but I don't remember ...

I have a Matsonic MS7188D and i want to upgrade memory to 512 Mo so i can't because the system detects always 128 Mo when i install the 512 Mo memory module So what is the problem and how to solve it ...