Hi I have a question about this specific problem. When I turn on notebook, it shows me that Product information is not valid.
System board (00A) - Board CT number invalid or missing
with this problem, another problem is occurred. Notebook is not charging... Only when notebook is turned off, battery is charging, but in windows... nothing. I searched and found this problem is known, but no solution helped me. I tried DMI Tools (HPBC375.exe). Following instructions, I found CT Number printed on mainboard (14 chars) and with DMI tools, "write information to EEPROM".
When I display system informations in DMI tools, it shows the same CT number I've write down, but immediately after starting the notebook, it Shows me Board ID - "HP" and Board CT number - "HP". So I'm stuck here...
In DMI Tools I have only CT Number option, but no Board ID ...
I tried flash BIOS and it helped.... No allert shown, windows started, battery charging and working fine... after restart, the problem has returned. I tried flashing bios again, but after first flash, I have never accomplish neither the same result as in my first try. BIOS is latest F.24 version
Mainboard is original, not changed. I can't unfortunately tell when this happend, because the notebook is used by more users.
Please can somebody help me ? Thanks