Would it be ok to rplace the 25v 680 uf capacitor with a 25v 1000 uf on a xboard in a lcd tv?

Yes, you can replace a 25V 680µF capacitor with a 25V 1000µF capacitor in an LCD TV, as long as the voltage rating is the same or higher. The increased capacitance means the new capacitor can store more charge, potentially improving stability in some circuits. However, ensure that the physical size fits and that the circuit can handle the larger capacitance without adversely affecting performance. If in doubt, consult the device's specifications or a professional.