Dashboard and electrical problem

Check the earth cable from engine / g/box to body . Also check alternator output , simple job .

alright i had the same problem with mine so i decided to find out what it was so i tryed everythink what you did then fort it might be behind the clocks so u took the covers off and pulled the speedo clocks out an there is a wire that is cliped onto the dash bord and its not a good conection into the speedo clocks so i tryed to start the car with out the clocks in and wudnt start so i new it was tha problem so i frew come cable ties around the white conection to stick onto the bash bord propaly and wasnt any more free play in it then pushed the clocks back in an placed panels back on and ever since i done that the car has worked perfect hasnt done it since mate