Vizio 3x37Lhdtv: Replaced broken panel and powered up unit. Display is showing a sequence of test patterns. Not sure why or what to try next. Unit does not respond to any keys or remote other than power on/off.

I have a recurring problem with a GE Profile PSB48LSRABV. Here's an example sequence:

• Fresh food compartment set to 37F on the control panel (for months)
• Thermometer in fridge reads 46F (with lots of water inside per manual)
• Press "Display Temp" button, display shows fridge at 37F
• Turn power off, count to 15, turn power on, wait for control panel to boot
• Press "Display Temp" button, display shows fridge at 46F (matches thermometer!)
• Compressor runs and cools fresh food compartment
• Hours later thermometer in fridge reads 37-38 (yeah!)
• Press "Display Temp" button shows fridge at 37F
• Within days, the fridge is warmer inside again, thermometer inside reads 45+, but display reads 37 - unit needs to be "rebooted" again!

Fresh food thermistor from top of cabinet measured properly in ice water (and warmer water), the unit has always passed all the self-tests, and condensor coils and fan are clean, so I had techs come give it a shot under home warranty:

• Trip 1 - Tech came to assess, ordered new evaporator fan
• Trip 2 - Replaced fresh food evaporator fan (note new fan is working in fridge, and old fan works fine on bench)
• Trip 3 - Ordered main computer PCBA
• Trip 4 - Replaced main computer PCBA

Unfortunately, it continues the same cycle of misreading the temperature until power cycles, and taking a day off of work for each visit is getting painful.
Any ideas?

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/

Check all voltages on psu output. check solder job and polarity on caps you replaced.

follow this steps and fix it. God bless you

Error 5
Description
The power up test sequence has detected a key in the operated condition. The power up test
sequence is performed every time the unit is turned on (powered up). This test is performed
because a permanently stuck key will inhibit the correct operation of the unit.
Possible Causes
1. A key on the display housing is permanently stuck in the operated condition.
2. One of the upper PCA's keypad interface chips has failed.
3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.
Possible Remedies
1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if
the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of
the display housing. Replace the display housing to correct the problem.
2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if
the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct
this problem. Most upper PCA's are provided without software. Therefore, the software (chip)
must be removed from the upper PCA being replaced and re-installed on the replacement
upper PCA.
3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up
sequence, if the

follow the steps and fix it. God bless you

The power up test sequence has detected a key in the operated condition. The power up test

sequence is performed every time the unit is turned on (powered up). This test is performed

because a permanently stuck key will inhibit the correct operation of the unit.

Possible Causes

1. A key on the display housing is permanently stuck in the operated condition.

2. One of the upper PCA's keypad interface chips has failed.

3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.

Possible Remedies

1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of

the display housing. Replace the display housing to correct the problem.

2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct

this problem. Most upper PCA's are provided without software. Therefore, the software (chip)

must be removed from the upper PCA being replaced and re-installed on the replacement

upper PCA.

3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up

sequence, if the ERROR 5 is no longer present, the liquid was the cause.

please proceed according and fix it. God bless you
Description
The power up test sequence has detected a key in the operated condition. The power up test
sequence is performed every time the unit is turned on (powered up). This test is performed
because a permanently stuck key will inhibit the correct operation of the unit.
Possible Causes
1. A key on the display housing is permanently stuck in the operated condition.
2. One of the upper PCA's keypad interface chips has failed.
3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.
Possible Remedies
1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if
the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of
the display housing. Replace the display housing to correct the problem.
2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if
the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct
this problem. Most upper PCA's are provided without software. Therefore, the software (chip)
must be removed from the upper PCA being replaced and re-installed on the replacement
upper PCA.
3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up
sequence, if the ERROR 5 is no longer present, the liquid was the cause.

follow the steps and fix it. God bless you

The power up test sequence has detected a key in the operated condition. The power up test

sequence is performed every time the unit is turned on (powered up). This test is performed

because a permanently stuck key will inhibit the correct operation of the unit.

Possible Causes

1. A key on the display housing is permanently stuck in the operated condition.

2. One of the upper PCA's keypad interface chips has failed.

3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.

Possible Remedies

1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of

the display housing. Replace the display housing to correct the problem.

2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct

this problem. Most upper PCA's are provided without software. Therefore, the software (chip)

must be removed from the upper PCA being replaced and re-installed on the replacement

upper PCA.

3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up

sequence, if the ERROR 5 is no longer present, the liquid was the cause.

follow this steps. God bless you

The power up test sequence has detected a key in the operated condition. The power up test

sequence is performed every time the unit is turned on (powered up). This test is performed

because a permanently stuck key will inhibit the correct operation of the unit.

Possible Causes

1. A key on the display housing is permanently stuck in the operated condition.

2. One of the upper PCA's keypad interface chips has failed.

3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.

Possible Remedies

1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of

the display housing. Replace the display housing to correct the problem.

2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct

this problem. Most upper PCA's are provided without software. Therefore, the software (chip)

must be removed from the upper PCA being replaced and re-installed on the replacement

upper PCA.

3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up

sequence, if the ERROR 5 is no longer present, the liquid was the cause.

see this causes and remedy, and fix it. God bless you
However RUN the software calibration for diagnostic, troubleshooting.

The power up test sequence has detected a key in the operated condition. The power up test

sequence is performed every time the unit is turned on (powered up). This test is performed

because a permanently stuck key will inhibit the correct operation of the unit.

Possible Causes

1. A key on the display housing is permanently stuck in the operated condition.

2. One of the upper PCA's keypad interface chips has failed.

3. Liquid (perhaps perspiration) is present on the surface of a touch sensitive display.

Possible Remedies

1. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is no longer present, the keypad is the cause. The keypad is typically part of

the display housing. Replace the display housing to correct the problem.

2. Remove the keypad connector cable from the upper PCA. Restart the power up sequence, if

the ERROR 5 is still present, the upper PCA is the cause. Replace the upper PCA to correct

this problem. Most upper PCA's are provided without software. Therefore, the software (chip)

must be removed from the upper PCA being replaced and re-installed on the replacement

upper PCA.

3. Wipe the surface of the touch sensitive display clean of all liquid. Restart the power up

sequence, if the ERROR 5 is no longer present, the liquid was the cause.

Sounds like you had a high voltage power surge just before going out
Are u using a high grade reference center or surge stage 2 or 3?