I usually suggest a bunch of steps, but you seem to have already tried most of them...
- you already restarted electrum
- you tried to switch servers
Some other things you can check/try:
- 2.7.9 is pretty old already, have you tried to upgrade?
- is your disk full?
- are you sure the network connectivity is OK?
- are you running electrum with the correct permissions/user?
To give you some piece of mind: as long as you wrote down the seed phrase, your unspent outputs can't be completely lost, there are always ways to recover your wallet as long as you hold on to your seed phrase...
Thanks for your reply:)
I am currently running electrum on a Debian operating system and I think that 2.7.9 is the latest version available for it? The other factors that you have stated to consider are all checked and tried. I have wrote down my seed on paper, I'm not exactly sure where to go from here? I've heard something about 'sweeping' but not sure whether this is available in my case?
Thanks:)
Not exactly:
https://electrum.org/#download
2.9.3 is the latest version, it's available for linux, windows, osX and android...
On linux, it's actually rather easy to upgrade, just make sure you have pip installed and enter "pip install https://download.electrum.org/2.9.3/Electrum-2.9.3.tar.gz"
Since 2.7.9 is almost a year old, it might be your best shot to do an upgrade before trying anything else.
If you can't get it to work, i'll help you export your private keys and import or sweep them in an other wallet tomorrow morning (unless you've found somebody else who could help you out by then)