Hi yes I removed my cd player and fixed my error3 issue ,but when I type in error4 the search engines come up with the error3 solutions,to take the cd unit apart is quite simple ,if you want to call me I can talk you through it ,I live in Leeds if your coming close by I would do it for you and take a look inside ,sometimes its a simple fix ,bear in mind I'm an interior builder not a technician so no guarantee I can definitely fix it but if you fancy a long drive I'm sure we could sort it between us .I'm not interested in money I'm just trying to help so send me an email and ill get in touch ,johncobb52@hotmail.com. 07957965491.