9900 won't go blank after a few secs

My wife's 9900 will not go to black screen after you let it sit for a few seconds like mine does and it also has a habit of when you lock it it blacks out and then few sec comes right back on. Some times reboot fixes it but tonight it is being annoying. I have 923 installed on it but see there is another newer version maybe it will be better. My phone had the hit the b key and get a period issue but my wife's phone is much worse it does it almost every time. I had this issue with my 9780 and hoped it would be gone with a whole new phone. Anyone have issues like this and find some solution?

Sounds to me like you need to reload the OS, but if it happened with another device I'm kinda stumped. With a fresh install and no apps running does it still do it?

Well I have reloaded the os as last night but while doing it I noticed the battery was low and while it was hooked up it all worked, so maybe it is a low battery issue as far as the light dimming properly. My wife does not always listen to me and charge the phone every night as she is not a heavy user. The keyboard issues just seem to be maybe a hardware problem that followed us from the 9780 bolds. Thanks will keep an eye on it now with this latest os and proper charging habits

I had that issue a while back. Does your wife by any chance have an app called "Leave It On" or a similar type app that allows for you to keep the screen on continually? I had inadvertently hit the "leave it on" option in the BB menu. Once I changed that it was working as it should again.

Sent from my BlackBerry 9900 using Tapatalk

I had the same as this. I realised it was my torch app was open with the light turned off. Because it lies to the media player the screen stays on so even when I locked it the screen would light back up after a couple of seconds.

It'll more than likely be an app causing the issue.