thank you for correcting that
I havent tried this yet but do you think this will work?
$servers = get-content u:\servers.txt
$services = @("Symantec Private Branch Exchange", "Netbackup Client Service", "Netbackup Legacy Client Service", "Netbackup Legacy Network Service")
foreach ($server in $servers){
$servicename = gwmi-object win32_service -filter 'displayname=$services'
$servicename.stopservice()
$servicename.startservice()
}