fluke 45 no display symptom

[ant17]

hi guys i am trying to fix a fluke 45. i am pretty sure the cal is ok. but it just started  when i turned it  on it would beep but no display. i got the fluke 45 service manual which seems to be the generic one on the internet .but in the schematic it doesn't show what some of the ics are and the ones it does are not the same part numbers can anybody help.