Insignia NS-46E340A13

[ngth82]

Re: Insignia NS-46E340A13

Funny story. I bought the tv from him on craigslist, thinking I would be able to come to badcaps and find a way to fix it...

it was nice to meet you David.

[dskall]

Re: Insignia NS-46E340A13

Well read through posts and continue with troubleshooting

[lmpina]

Re: Insignia NS-46E340A13

My experience with this TV (Insignia NS-46E340A13):
1. Color (using default factory settings) could be better - much improved (but still not great) by installing firmware update 2.05.
2. Power on problems / won't power on at all - solved by replacing U403, the EPROM on the Main Board. Replacement EPROM costs about $20 on eBay. Instructables.com has a good tutorial on this titled "How to Repair Dead Mainboard on INSIGNIA LED TV NS-46e3401a13."

[=N=]

Re: Insignia NS-46E340A13

Insignia NS-46E340A13 TV.

The TV reboots and power cycles continuously.

Power board: 715G5173-P02-W21-002M / (T)CR248XF3
Main board: 715G5738-MOD-000-004K / (T)TXCCB0K090000TOP:A MB:A v2.02

Upon applying AC power, the unit turns ON completely by itself
The back-lights turn ON
The TV power cycles itself (power LED blinks 3x times, the back lights turn on, the Insignia logo shows up, back lights turn off, and the process repeats) Tv stays ON for maybe 40 seconds and reboots forever regardless of time for warming up.
Voltages observed on connector CN902)power boards PSU : are as follows (as observed from top to bottom with the board is installed): pic included

CN902: (Volts)
ON/OFF 4.5
DIM 2.3
12V 12.30
12v 12.30
GND 0
GND 0
GND 0
24V 25.00
24V 25.00
PS_ON 5.0
5.2V 5.0
5.2V 5.0
P_OK 0

Voltage across the main caps are : 385V

NO bulging ,no electrolyte spillage, looked with magnifying glass just in case since they can bulge from the bottom as well.
No discolorations due to spillage of electrolyte OR over heating

The fuses on the power board are good; same with the T-con fuse.
Tried disconnecting the Power button board ( which appears useless) and the Tcon to isolate the issue and does the exact something .

Thoughts
???
Thanks

[=N=]

Re: Insignia NS-46E340A13

forgot the pics :} here you go ,
there the same as the original posters its identical to his ngth82.

[=N=]

Re: Insignia NS-46E340A13

Any one ????

[nomoresonys]

Re: Insignia NS-46E340A13

Post #23 looks interesting, you might have same problem.

[=N=]

Re: Insignia NS-46E340A13

Post #23 looks interesting, you might have same problem.

indeed its been bought and arrives today or tomorrow, I have power everywhere its suppose to be, I think.

[budm]

Re: Insignia NS-46E340A13

When the TV power cycle by itself, does PS-ON Voltage also swing up and down in sync with the power cycle?

[=N=]

Re: Insignia NS-46E340A13

When the TV power cycle by itself, does PS-ON Voltage also swing up and down in sync with the power cycle?

THX for trying to help. All voltages seemed present. so it turns out its 100% the bios.
bought it on ebay

https://www.ebay.com/itm/EEPROM-FOR-...53.m2749.l2649

Note: Changing a bios chip isnt like a screw you kinda need to know what your doing and avoid destroying traces.

[budm]

Re: Insignia NS-46E340A13

Good to see it is running again.

[nomoresonys]

Re: Insignia NS-46E340A13

Nice fix.