Magento grid in admin module doesn't load after update from 1.3 to 1.5

this question may look a little like these: Magento Grid Container Block not loading grid Grid doesn't appear in custom admin module in Magento but it isn't the same issue, I believe.

I'm not the admin in this magento store, I only do some support/bugfix work on it. Server had Magento v1.3 installed, and there was a group of custom modules (I don't even know what were they for :P) written for it. Everything worked fine until someone updated Magento to v1.5. Every module had a grid with some data in it.

After updating, the grids stopped showing up, so pages where there were grids, are now blank, only the rest of admin panel (menu, etc.).

I guess modules were written for 1.3 and there is some common cause for them to disappear开发者_运维知识库 after update. I don't think that any core files were edited. Did you ever encounter such problem? If yes, can you give me any hint about how to bite this problem?

Cheers, Maćko

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Grid.js has changed between 1.3 and 1.5. You may want to make sure that it is being loaded (Firebug) and then from where. It may be that a module is specifying a different version of the standard grid module.

Try going into admin - system - configuration - advanced and disabling all of the 3rd party add-on modules as that might bring it back to life.