grumpy-grapefruit

ive tried all that has been suggested to no avail. and i cant replace the string cos i cant afford to.

it's a Cheap Nevada P bass knock off with a hardtail bridge.

Hi, i'm new hear and have a question for the masses of technical genius' that are on this forum. I have just replaced my strings for the first time and i have suddenly developed a problem. all my strings are fine and all sound nicer and brighter then the old ones. However my "A" string buzzes. It buzzes when open and fretted and i know it's not Fretboard buzz. It sounds to me to be coming from the bridge. and raising and lowering the bridge has done nothing to remove this buzzing. Neither has lengthening and shortening it. Iv'e even tried tightening the bridge and still nothing happened. All help would be appreciated, as i have found nothing about this problem anywhere on the internet at all! P.S apologies for the bad pun in the title