If you're asking how to get an LCD screen, you're probably not going to be able to install it yourself. Send your unit in for repair, or find a trusted outlet to repair it for you.
If you're determined to find an LCD screen, you may have to resort to something like eBay, and trust that you can find the help necessary on the internet. Here is not the place - you need a blow-by-blow picture guide.
You can't get a new screen for your PSP, but you can always get a new one at a local game store or walmart.
buy a new one
contact playstation about the problem or go online to buy another screen.
Yes but it is usually cheaper to buy a new one.
No. Use an external monitor, like what you find with desktop pc's
You can buy a large screen LCD TV for a reasonable price at local electronic stores. If you don't mind it being used you can also try Ebay, they also sell brand new ones.
You can try to follow a youtube video, buy a screen and fix it yourself. You can buy a new one. Or you can see if Sony can fix it for a fee
Yes, however the screen is the most expensive component and it may be as expensive as replacing the tv.
Depending on the water damage, you might get away with opening the front cover of the PSP and cleaning it, or if the LCD is damaged, you can buy one fairly cheap and replace it yourself. it's not very difficult, but requires a steady hand, and I suggest using latex gloves so you don't leave fingerprints on the LCD or inside the cover. I've fixed a broken LCD for around $20.
It really depends on the type of LCD screen. If it's on a large, hdtv, it is definitely cheaper to repair. Smaller TV's or computer monitors would probably be cheaper to buy a new one.
U can look online how to becayse i had a broken psp screen and my bro took it out and put in a new one for me so now my psp is perfect!
The most useful Psp accessory tends to be a screen protector or Psp case. These protect the Psp's screen and the unit itself from damage.