Thank you very much for replay....

Hello caps,
To clear password follow this steps (work only on Main bin file) :

A) Replace "aa 55 3f" with "aa 55 3c" :

1. After : QP.o.w.e.r.C.o.n.t.r.o.l (adress : 1994exx)
2. After : QH.P._.R.u.n.t.i.m.e.B.B.C.h.e.c.k.P.o.l.i.c.y (adress : 1996xxx)
3. After : f.f.l.i.n.e.U.n.i.q.u.e.I.D.E.K.P.u.b.C.R.C (adress : 1999xxx)
4. After : QH.p.C.o.m.m.o.n.S.e.t.u.p (adress : 199axxx)
5. After : m-B.u.i.l.d.I.d and Before : F.a.c.t.o.r.y.C.o.n.f.i.g (adress :199axxx)

B) Replace "00 00 00 00" with "23 01 00 02" : Exactly after : H.p.M.p.m.....

HI, I have a problem with ProBook 640 G8.
I had BIOS password, i cleared EC... but when i power on laptop i have 3-long + 2-short beeps and no display.
Even if i used EC backup or other backups from this furum, i have same problem...
Can any one help please by repairing this backup or any idea to solve this problem.
Thank you in advance.
NB : it's not RAM issue because i tried 4 foctionnal RAMs.
Product Name : HP ProBook 640 G8 Notebook PC
Serial Number : 5CD1488WBN
Motherboard : DAX8QMB38A0 REV : A...