I have issues with my unit. Sync problems

Does the player work with other blurry discs? If so, then your new- used disc has issues. You can try cleaning the disc or buy a repair kit.
If that doesn’t work you can try a different player.

The Apple iPod is a handy device for listening to your favorite music, but mechanical issues can lead to frustration.

In particular, one problem you may encounter is a touch screen that ceases to function, whether completely or only on certain portions of the screen.

In some cases, a simple fix can solve the problem, while in others, a malfunctioning touch screen may be the sign of a more serious issue.Moisture

Moisture on your fingertips can cause an iPod touch screen to function erratically or not at all. Foreign substances such as hand lotion can also impact the touch screen.
A good practice is to thoroughly wash and dry your hands before using the device.
Wiping the screen with a microfiber polishing cloth can remove any debris accumulated on the touch screen, allowing for the direct fingertip contact necessary for proper functioning.
Barriers

Using a plastic sheet to cover the touch screen provides protection against dirt and smudges. However, the plastic can also create a barrier that prevents essential fingertip contact, especially if it is old and dirty.

Removing the plastic allows you to test the screen to see if it is hindering operation.
Wearing gloves when using your iPod may also inhibit the necessary screen contact, so removing them may also provide a remedy.

Ending Application If your iPod's touch screen freezes or becomes unresponsive when using a specific application, simply restarting the application may solve the problem.

First shut down the application; if this doesn't work, shut down the unit completely and then restart it.
Dead Spots
Instead of a completely unresponsive screen, you may experience difficulty only in specific areas. These "dead spots" are often the result of malfunctioning pixels, which are the components that comprise a digital image.

If you suspect bad pixels are causing your touch screen issues, notify Apple Support for repairs or even replacement.

According to the Tuaw website, Apple's policy has generally been to provide automatic replacement for iPods experiencing pixel problems.

Start with a 'clean boot':
Start - run "msconfig" - go to the startup tab, de-select everything and reboot. Then go back in there and select the options one by one with a reboot inbetween, that will show you which item is causing the issue.

Try changing the battery, if windows 10, the power settings may need adjusting..just Google power settings windows 10

same thing happens to me - most of the time it will just randomly freeze; occasionally i get an unresponsive black screen. this 24' aluminum imac usually has startup problems also - sometimes it will "gong" and nothing else; sometimes the apple logo will come up and then nothing else; sometimes it will load the logo and then spin for a few seconds and then freeze - the only option is to manually shut down. there is no rhyme or reason to it

It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.

Remember there are leathl Voltages inside TV's, and generally these days don't contain any "User Servicable parts" like in the "Old" days, instead Board Replacment is all that is generally done.

You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done.

Buy a new one for $159... post old one PLUS new un-needed speakers on Craig’s List. Problem Solved.

Email sync: make sure each account is set to send and receive automatically every xx minutes. I think the default is four hours?
Phone freezing: are you using WiFi or your cell data network? I've found if you're using WiFi and have a weak connection, the phone will spend a lot of time trying to re-connect.
Resetting the phone: pulling the battery is a bummer-- have you tried using the reset button on the bottom of the phone (to the right of the power connector)?

These are the most common methods for recovering Sandisk's Sansa Mp3 Players. I have been almost universally successful in recovering Sansa players using one or a combination of these methods. These methods do not work if you are having synchronization or music format issues - they are for recovering a player that will not power up, freezes, flashes, is not recognized by the computer, and a host of other issues.

Reset the Sansa Player first. On most models, restart is done by holding the power button in for 15 seconds or longer. Check your specific manual to be sure. The manuals are available from the Sansa website if they have been misplaced.
Download the Sansa Recovery Tool from the Sansa website.
Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/DriverDownload/driverList.asp
If these fail, then:
Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
If you get the problem where MTP Device keeps popping up continuously, uninstall the “MTP Device” by going to Start à Control Panel àSystem à Hardware à Device Manager (you computer may vary slightly, depending on Windows Version).
You may have to restart your computer after each of these methods to get them to work properly. Disconnect your Sansa player BEFORE shutting down your computer.
-Tha Mp3 Doctor

These are the most common methods for recovering Sandisk's Sansa Mp3 Players. I have been almost universally successful in recovering Sansa players using one or a combination of these methods. These methods do not work if you are having synchronization or music format issues - they are for recovering a player that will not power up, freezes, flashes, is not recognized by the computer, and a host of other issues.

Reset the Sansa Player first. On most models, restart is done by holding the power button in for 15 seconds or longer. Check your specific manual to be sure. The manuals are available from the Sansa website if they have been misplaced.
Download the Sansa Recovery Tool from the Sansa website.
Format - Erases Everything: Connect your Sansa player to the computer and open Windows Media Player. Click on the Sync tab. Pull down the drop down menu underneath the Sync tab by moving your cursor over the Sync tab and left clicking on the little black arrow underneath the Sync tab. Highlight "Sansa 1GB" (wording may vary slightly), and then select "Format." - this should erase everything.
Firmware Upgrade- Erases Everything: Get the latest firmware upgrade from Sansa - it updates the firmware and erases every song in the player all at once. Note: this method doesn't work if already have the latest firmware. Go to this website and click "Firmware Updater" to find out: http://www.sandisk.com/DriverDownload/driverList.asp
If these fail, then:
Try this: disconnect the player from the computer, turn it off, hold in the volume + button, and reconnect the player to the computer while holding the volume + button in. Keep holding the volume + button for an additional 5-50 seconds. Windows should eventually go into recovery mode and revive the player- it will pop up a window that says Found New Hardware Wizard.
If you get the problem where MTP Device keeps popping up continuously, uninstall the “MTP Device” by going to Start à Control Panel àSystem à Hardware à Device Manager (you computer may vary slightly, depending on Windows Version).
You may have to restart your computer after each of these methods to get them to work properly. Disconnect your Sansa player BEFORE shutting down your computer.
-Tha Mp3 Doctor