SAMSUNG DIGITAL HOME CINEMA SYSTEM MODEL HT-Z110 WITH POWER ON IT INDICATES ''HELLO'' AND THEN ''PROTECT'' AND SWITCHES OFF IMMEDIATELY.

try this

http://www.repairfaq.org/sam/cdfaq.htm

hi,i can't connect my audio tv to cinema theater dvd

Audio amplifiers IC´s damaged need to be replaced

check your speaker wire connection for a short

Hi! my unit is the same model as you have, actually i only resolder the power supply board. and it turned ok try what i did it might solved your problem.

you need to change 5q tranzistor.if you dont have short circuit on pin 9 to ground on flat who comes from amplifier

Protection Error means that there is a malfunctioning component inside your unit. It will go into protection mode and immediately shut down to protect your system from any further damage. Unfortunately you would have to bring it to a dealer or repair shop to diagnose the exact malfunction and that could be expensive.
Gary

Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Home Theater System Is Displaying "Protection" As soon as the unit is turned on, the word "PROTECTION" will flash on the front panel of the unit and SHUT OFF. This error message usually indicates that the fan in the back of the unit is not on.

The PROTECTION feature automatically shuts down the unit to avoid further damage. The unit will need service if this error message is displayed.

Please use our ASC Locator to find your nearest Authorized Service Center

from samsung's web

http://www.samsung.com/au/support/faqs/supportFaqList.do?group=&type=hometheatre&subtype=hometheatresystems&model_nm=HT-Z110&dType=D&mType=UM&vType=R&prd_ia_cd=03030100&acc_ia_fl=&disp_nm=HT-Z110&menu=faqs