My wife and I both have a CU920. A few days ago she told me that her phone was shutting down and could not be turned back on unless the battery was removed and replaced. She also said that the orange tv logo was showing at the top of the screen. After trying all I could think of to fix the problem I decided to try and re-create the problem on my phone which was working fine, with the idea that by finding the cause I could reverse it.

The first thing I tried was to click the TV button on the bottom of my screen. That brought up ATT Mobile TV application which took a minute or so to load showing a "now loading" progress bar. Once the application loaded I closed it and let my phone sit on my desk. Within 15 minutes it had turned off and I could not restart it without removing the battery.

Success! I recreated the problem....

Now... I cant fix either one.

I've tried what seems like everything to resolve it including a system reset and software reset. The problem Obviously was caused by accessing the mobile TV. I've checked many forums and several have had threads saying to remove the SD card and it's fixed. There's gotta be another answer since it was caused by Mobile TV.

Both phones are the same...

LG VU CU920
Firmware: KLMZ-4.0.90201D
Software: V10s-DEC-12
SD Card 2GB Kingston

Please Help

I agree, I'm not sure what oulling the Micro SD card would have to do with the Mobile TV app. But in the off chance, have you tried pulling your Memory card to see if by some chance it works? It sounds like you have been very thorough in trouble shooting Your Devices... Questions that I have are:
1: If you do activate the TV does the TV actually work (Other than shutting down...?)
2: Do both you and your Wife have 2GB Kingston memory Cards?
3: Are there any other applications running on the phone?
4: How old are the Phones?

Let me know.

The Mobile TV service is really spotty in this area and I've Been told it's in testing, but yes it does come up and work, but we are not subscribed.

Both Phones are Identical, same cards, and both were bought in March of '09 and working fine with the cards in and being used for music and pics with no problems until Mobile TV was accessed.

The only apps on the phone are what came with them.

I have pulled the SD cards out and the phones are running fine without it. I believe it's the application causing the issue.

When working "normally" the phone will lock the screen and then go black after a minute, but when you hit the lock button it comes back on like you would expect. One of my theories is that it's not actually shutting down but the system is freezing, becoming non-responsive, like a computer running Windows ME. However I cant tell if it's off or just froze because there are no other power indicators.

I spoke with AT&T tech/warranty people and they "have never heard of this problem before". They are sending two new phones for replacement. I guess that will sort of fix the issue as long as we never hit the TV button on the new phones, But I'd like to be able to figure out the issue to fix it when/if it happens on the new ones.

I'm glad you're getting new phones! At least these will have the latest Firmware so if there is an issue, hopefully, this will address it!

Let me know what happens.

well at least you had solved your problem, one must look out for several applications for sometimes these applications can damage gadgets software's or worse

DEJA- VU, (Feb 5th 2010)I've got your phone. I purchased it December 18th 2009. It didn't come with a sd mini so I purchased that a couple of days later.. I spoke with customer support today because somehow Mobile TV was accessed but not activated and the female rep from ATT said that no data was being used and had me try several times to go to subscribe manager and push no, "are you sure" I pushed yes, yes again and then exited the application rebooted the phone and it was gone for per say the phone would go black. I would unlock it again and before the 1 minute for shutdown was to happen again the orange TV icon (just right of the bar graph)reappeared at the top. A half an hour later of inactivity and the phone was locked/frozen. I removed the battery and reinstalled it after 30+ seconds and the phone would come back to life (minus the icon for a few) and something you said clicked here?? battery compartment lid had a slight raise in temperature and a fully charged battery by this time was down one bar. (It was draining, it had to be draining in the dormant state. I thought it was in.. The PRO responder to this original question, have you heard any new input as I will be calling ATT again tomorrow with this posting. Unfortunatily with ATT you have to be patient because customer support gets there first crack at diagnosing the problem before they put you through to technical support which I pray will be the same outcome as sending me a new phone. Best Buy where I purchased it from wouldn't touch the issue because I was over 30 day out their door. Told me to call ATT, it wasn't their problem. thanks for hearing me out, Michael D

be careful with those phones they are known to have some issues ,it was a wise move to call at&t,the customer service folks at lg can be very difficult when it comes time to stand buy there products,usually at&t has a little more pull.good luck with those phones but be careful with them.

they decided to replace it, they said they werent aware of any problems with that 920vu, warrenty dicided to eat the shipping and it should be here tomorrow. i have fingers crossed now that it doesn't happen again. something that warranty did ask at at&t was under the battery punched through the casting if the color was white, green, red, or orange? my was white and she wanted to make sure it was white as i had a magnifying glass looking at it. i told her yes and she replied as if it was a 1st generation 920vu. i'm looking forward to see what color is to be delivered tomorrow. i'll print something back if the color changed from the white dot that i will be sending back to them. thanx, mike

they have 2 moisture censors in them ,it lets lg know if the phone or battery was exposed to water,if its white your in luck,i wish i had contacted at&t first!.thats great that they are helping you out.

after re reading your post im thinking that white thing your talking about is not what i was referring to.my apologizes,im just glad you got someone that had you send it in without making her own judgement call on the phone .i sure do wish i called at&t first,anyways good luck.