Trying to repair a Tecnoplay X Force. When turned on it shows all the lit LED’s for power to Main board, GI is on but does not boot. No display no other signs of life apart from sound if you press the test button on the sound board. When I first saw it it has corrosion on the game eproms and both ram chips. I cleaned it all up fitted sockets, cleaned the 4 IC’s and no change. Is it worth relaxing the game rom if I can get one or repacking ram IC’s or something else.