Is it possible to change the firmware or platform on a polaroid smart tv 3-32-led-14 service menu..menu 4725 or jailbreak ???

1. Check the storage capacity of your USB drive. If it's full, free up some space or use a larger USB drive.
2. Check if the USB drive is formatted correctly. It should be formatted in a file system that is compatible with your TV.
3. Make sure the TV is set to record to the correct source (USB drive).
4. If the TV is still not recording, try restarting the TV and the USB drive.
5. If the issue persists, check for any firmware updates for your TV and install them if available.
6. If none of these steps resolve the issue, you may need to contact Polaroid customer support for further assistance.

Keep in mind that the exact steps to resolve this issue may vary depending on the model of your Polaroid smart TV.

How long have you unplugged it for most TV's have a battery back up which you will have to wait for it to power down after unplugging could take up to 24 hours they do this to keep settings in case of a power cut

TRY THIS FIRST TO OPEN SERVICE MENU
!. Press SOURCE button
2.In SETUP menu screen press numbers 2580 on remote
3.On FACTORY SETTINGS menu select PANEL SETTINGS
4.Then make appropriate changes
Then Power off then on tv and it should be reset

TRY THIS SECOND IF THE FIRST DID NOT WORK TO OPEN SERVICE MENU
1.Press SOURCE button
2.In SETUP menu screen press numbers 2580 on remote
3.On FACTORY SETTINGS menu select SPECIAL SET and ENTER button
4. It will take you to a second screen but still in SPECIAL SET menu click on RESTORE FACTORY DEFAULT

You mention two separate issues, WiFi and smart hub. As you know Samsung built in manual is the worst idea ever. There is no picture of the complete rear panel connection for example.
If the smart hub is the actual WiFi antenna then if your system doesn't recognize Smart Hub then you have a bad smart hub.
to test smart hub plug something into hub ( DVD HDMI, video game) If your remote has smart hub button press and see what appears. Otherwise select source on remote see if your attached item appears. (That would indicate smart hub does talk to TV)!
Since you can access your network when hard wired your network password is stored.
Once you have verified Smart Hub is functional then work on WiFi.
i will say my Samsung is 3 ft from my router and hard wired for better streaming speed.
I use Bluetooth access to share photos from IPads.
I would leave TV hard wired.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

LG Smart TV System - Voice Recognition

Pressing the 'Mic' button on the Magic Remote calls up LG's voice recognition system, joining similar systems offered by Panasonic and, most notably, Samsung. Interestingly, LG's voice system doesn't offer you control over your TV; rather it just allows you to verbally input terms into the TV's content search engine. An engine that covers everything from the VOD services carried by LG's Smart TV platform to YouTube and the Internet.
This approach to voice interaction actually makes perfect sense to us, as it stops the voice recognition system from getting too complicated or 'invading' parts of the TV's functionality where it really doesn't need to go.
The system recognised pretty much everything we said to it accurately, and the presentation of the results is attractive. It's great, too, that unlike Samsung's Smart TV system, you can see instantly when a search result appears which source that option is available from, and how much it might cost you if it's available via a pay per view platform.
It's important to add, too, that as well as supporting searching for specific films, TV shows, actors and so on, LG's online platform carries a recommendations system activated, for instance, just by saying 'show me recommendations

There are two types of reset to TVs. The first is simple to do; a Hard Reset; and the other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight; will be better. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.

M (menu) 7935 (regular menu appears), them press 4725 (menu service appears), then search HTLSRC (position 090), then set value 032 (this value disables Hotel Mode) - TV. Now Hotel Mode is deactivated. It is verified!

M 7935 4725, go to HTLSRC (090), fix 032 - press TV. Good luck!