Lg e400 screen goes blank when calling

SOURCE: Lg rumor phone screen goes blank! Then comes back on its own.

its broke...ive had many rumors finaly sprint saw that it wasnt me breaking them and i upgraded to a pink instinct for a good price...i would say try and get a better phone because trust me every rumor you get will end up breaking the same way!!

SOURCE: screen goes blank when being called or calling out!!!

Reviewed by Geoff_W from UK on 26th Jun 2009
A GREAT PHONE - spoiled for many by the screen blanking problem on making or attempting to receive calls. Some seem to have solved the problem by removing screen protectors, but this didn't work for me. I sent the first phone back for a replacement - but this was just as bad. The problem seems to be the result of a poorly calibrated proximity sensor - but you can re-calibrate it. The following procedure worked for me, but it's potentially dangerous, and could ruin your phone if you're not careful - YOU HAVE BEEN WARNED! 1. On the phone keypad enter the following code: 1809#*900# to bring up the engineering settings menu. 2. Scroll down to the entry called OTHERS and select it. 3. Scroll down this menu to the entry called PROXIMITY and select it. 4. You should see three options: Enable, Disable & Start Calibration 5. Select Start Calibration - after a few seconds it will return a new figure (mine was 3627) 6. BACK right out of the menu system, and make a test call - it should blank the screen when you hold it to your ear (or when you hold a finger near the sensor), but come back on again when you remove it. It worked for me - so now my Viewty Smart works just as it was supposed to. This information is offered without warranty - Good luck if you try it! 4 stars for the phone design - loses one for the delivery set-up, and lack of documentation of a fix.
This method worked for me.

Bud Martin

• 11361 Answers
• Posted on Nov 14, 2009

SOURCE: LG 26LG30 screen suddently went blank. Light flashing blue/red

There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

SOURCE: LG gc900

In a reasonably Dim room not bright sunlight Dial 1809#*900# enter the Engineering section scroll to others then Proximity then recalibrate the sensor, mine worked perfectly after that tip

SOURCE: My LG 2353 monitor screen goes blank

shaylane_195, Good description of problem! But you left out one or two key things to tell me. Age of monitor? Approximate total "ON" hours of use? Is unit covered by LG (Lucky Goldstar) warranty? You and only you can tell me if the screen is really BLANK, or is it only BLACK? Do flashlight test to determine true state of screen! Can you see very, very faint image of WIN-desktop holding bright flashlight near your black screen? This monitor works!!! You just need to fix the possible (1) "cold, frosty looking, thermally intermittant solder connection on the "internal switch-mode-power-supply/CCFL inverter board. Yes, your monitor along with many other CCFL back-lit LCD units of all brands also could have some BAD, swollen, leaky electrolytic filter capacitors installed on the SMPS/CCFL inverter board which will need to be replaced with new ones of higher quality. Get back to me, lmistyrel on aim. or do additional comment on fixya, after you do some reading in my and other fixya tech's profiles to discover all options you as consumer/user have open to you. Bye for now. 12fixlouie