Fellow Techspotters, I am currently trying to repair a colleague's Toshiba Equium U400-145 Laptop. When the power switch is pressed, the laptop boots as normal and you can hear the windows (vista 32bit) welcome sound. The problem is that the screen very briefly shows the initial toshiba logo screen then goes blank whilst it boots. You can still see a very faint image on the display and the display works fine on an external monitor. I suspected that it was an inverter problem having 'googled' the problem - the majority of advice given on forums was that it pointed to an inverter problem. So far I have therefore changed the Inverter (twice); the first one worked for 3 weeks and then the same problem occurred. The second inverter lasted just 3 days. I am hoping that I have just been unlucky with the quality of Inverters that I have purchased (3rd one currently on its way gratis from seller), otherwise there may be another underlying cause for the screen display to keep failing (power surge, faulty ribbons?). Other forums mention CCFL failures but because the screen appears to be fixed with an inverter change (for a while anyway), I cannot see that it is the 'backlight' that is the problem. I may be wrong. So my learned friends - anybody had similar issues or can offer some sage advice? All comments and advice sincerely welcomed. Thank you in advance of time and thoughts.