Here's what your Blackberry Situation that may possibly fix this solution:The phone hasn't been anywhere close to water and the moisture stickers
are intact. Can still hear tones from incoming call or text messages.
Other than the display screen the phone is fully operational. Dm sees it
perfectly, You can still do a blind-call out and receive calls. Only
problem is i can only see a bright white screen.
Many sites has been suggesting a solution such as this: Battery pull,
wipe, reinstall 4.6, reinstall 5, backup and restore files, clean
install, battery left out for 24 hours and installed a new battery but
it doesn't fix the problem.
Now, heres' a solution on how to fix a a Blackberry Bold 9700 with white screen problem.1. Reassemble the Blackberry bold 9700, only do it unless the warranty period has already expired.
Now, locate the highlighted components as shown on the image. These are
the display filters. Works as electrostatic discharge (ESD) and
electromagnetic Interference (EMI) filters, and once being damaged it
will cause and result to a white screen, sometimes being garbled or
saturated screen display.
Check those components and have it replaced, you may find these parts
from any old Blackberry phone PCB board that are already junked. Just
like the one below that taken apart from the damaged Blackberry 9100 PCB
board.
Then in place it to your Blackberry bold 9700 display filters. Try
replacing one by one then power it again to check, just repeat until all
four filters being replace and get the screen display fix.