Pls I'm having problem with my laptop. It is Compaq 6720s. If i switched it on it will always show me pure white screen but there was a day i changed the memory to eachother which it worked normal as it was working perfectly before. But for me to coupled it back and put it on again, it has started the problem again. Pls all engineers here, am i to change the mother board? What is the problem and the solution for it? Thanks immensely for your anticipate cooperation.

First try and connect your laptop to ur flat screen TV via hdmi and see if it displays on your TV.

quiestla:
Pls I'm having problem with my laptop. It is Compaq 6720s. If i switched it on it will always show me pure white screen but there was a day i changed the memory to eachother which it worked normal as it was working perfectly before. But for me to coupled it back and put it on again, it has started the problem again. Pls all engineers here, am i to change the mother board? What is the problem and the solution for it? Thanks immensely for your anticipate cooperation.

The fault is from the motherboard, contact me 08064724259 call/WhatsApp I'll do it for you at an affordable price

Note that, it has nothing to do with the ram since the system is already displaying and the fault is not from the screen. Even if you change 1million screen it will still show pure white.

Some cases when battery issues, your priority is not replacing the battery first thing you should do is check your laptop,
These are the three things you should consider before replacing your battery.

1 check for apps running on background
2. Reduced screen brightness and reduce screen sleep to 3 minutes

3. Go to task manager and clear in relevant apps then turn off WiFi if you are not using it

Hope this tips should help.
If you want to learn more about your laptop battery maintenance use the link below.
Use: http://smarthack.club/6-ways-to-fix-laptop-battery-issues/