# Suddenly I see source instead of math formulas, why?

A couple of days ago everything worked perfectly on my chrome, today I only see the tex source of all the math formulas, I have no clue why. I did not change any settings, maybe I've updated my chrome like a week ago. How can I fix this?

• Maybe MathJax client side library is blocked on your side. What you see when browsing directly to cdn.mathjax.org/mathjax/latest/…? – Shadow Wizard Mar 19 '15 at 7:15
• @Shadow: It says This webpage is not available. – domotorp Mar 19 '15 at 7:26
• Try with a different browser to check if it's browser issue or global block on your side, e.g. proxy/firewall/ISP. – Shadow Wizard Mar 19 '15 at 7:50
• @Shadow: Now after I've refreshed, it works again. Before I had also tried refreshing, but then it was no help. I leave the question here as it's an issue that others might have and it would be nice to know how to fix. – domotorp Mar 19 '15 at 8:59
• Now cdn.mathjax.org is down, at least when accessd from my area (Czech Republic). Only LaTeX source displays on Mathematics. Maybe they have problems lately. – Palec Mar 22 '15 at 18:14
• Fwiw, it works from NY USA. @Palec do a traceroute maybe? – Jason C Mar 22 '15 at 18:21
• @JasonC Obviously it’s not just my problem. In this test, Asia is OK, Europe and US time out. monitis.com/traceroute/… In my area, the hostname fails to be resolved. – Palec Mar 22 '15 at 18:34
• @Palec Maybe some DNS changes somewhere? In which case it should fix itself at some point in the near future. I wonder if it works if you change your DNS servers to 8.8.8.8 or something. Just out of curiosity, what is your current primary DNS server? – Jason C Mar 22 '15 at 18:35
• @JasonC $dig cdn.mathjax.orgconnection timed out; no servers could be reached, $ dig cdn.mathjax.org @8.8.8.8 → no answer section. But a minute after it caught up and now both Google and my DNS return correct results and MathJAX on Math.SE works. – Palec Mar 22 '15 at 18:42
• And here we go again. The same problem. – Palec Mar 22 '15 at 19:14
• Now I noticed your question about primary DNS server, @JasonC. I resolve using my TP-LINK Wl841N router, it uses the resolver of my ISP. What goes next? Who knows… – Palec Mar 22 '15 at 21:01
• Repro is Ohio. isup.me seems to agree it's down – bjb568 Mar 24 '15 at 22:08