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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Toshiba Laptop, dead screen, LCD power supply question
Greetings,
I have a Toshiba Satellite that the LCD display has gone out, looks like the florescent tube, screen looks like it is displaying, very dim.... I removed the 4 screws around the corner of the bezel and popped it loose, that gave me access to the LCD screen and the High Voltage power supply for the screen light. It looks like it got a little warm about mid way on the H0504532 (U2) IC Chip, 8 pin SMT and I found the fuse open on this same PCB. I was wondering if, perhaps, the fuse just let go, looks like a 1 or 2 amp fuse element, can't really see the number on it, kind of looks F0 (it is a surface mount fuse). I have fixed a couple of the flat screens by only replacing the fuse and checking and replacing any toasted caps. I was wondering if, these Toshiba laptops have that same type of failure. Thanks in advance, Markus |
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Toshiba Laptop, dead screen, LCD power supply question
"Markus" wrote in message ... Greetings, I have a Toshiba Satellite that the LCD display has gone out, looks like the florescent tube, screen looks like it is displaying, very dim.... I removed the 4 screws around the corner of the bezel and popped it loose, that gave me access to the LCD screen and the High Voltage power supply for the screen light. It looks like it got a little warm about mid way on the H0504532 (U2) IC Chip, 8 pin SMT and I found the fuse open on this same PCB. I was wondering if, perhaps, the fuse just let go, looks like a 1 or 2 amp fuse element, can't really see the number on it, kind of looks F0 (it is a surface mount fuse). I have fixed a couple of the flat screens by only replacing the fuse and checking and replacing any toasted caps. I was wondering if, these Toshiba laptops have that same type of failure. Thanks in advance, Markus Replace the fuse, 2A is the largest I'd go. If it blows again then something else is wrong. |
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Toshiba Laptop, dead screen, LCD power supply question
Markus wrote: Greetings, I have a Toshiba Satellite that the LCD display has gone out, looks like the florescent tube, screen looks like it is displaying, very dim.... I removed the 4 screws around the corner of the bezel and popped it loose, that gave me access to the LCD screen and the High Voltage power supply for the screen light. It looks like it got a little warm about mid way on the H0504532 (U2) IC Chip, 8 pin SMT and I found the fuse open on this same PCB. I was wondering if, perhaps, the fuse just let go, looks like a 1 or 2 amp fuse element, can't really see the number on it, kind of looks F0 (it is a surface mount fuse). I have fixed a couple of the flat screens by only replacing the fuse and checking and replacing any toasted caps. I was wondering if, these Toshiba laptops have that same type of failure. Thanks in advance, Markus Hi Markus... Which model number do you have? And is it a Satellite, or Satellite Pro? Ken |
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Toshiba Laptop, dead screen, LCD power supply question
Ken,
It is a Satellite 3000-S353 (system unit) with a part # of PS300U-03YKN2E. Hope that this helps, thanks in advance, Markus On Sun, 16 Oct 2005 04:06:51 GMT, Ken Weitzel wrote: Markus wrote: Greetings, I have a Toshiba Satellite that the LCD display has gone out, looks like the florescent tube, screen looks like it is displaying, very dim.... I removed the 4 screws around the corner of the bezel and popped it loose, that gave me access to the LCD screen and the High Voltage power supply for the screen light. It looks like it got a little warm about mid way on the H0504532 (U2) IC Chip, 8 pin SMT and I found the fuse open on this same PCB. I was wondering if, perhaps, the fuse just let go, looks like a 1 or 2 amp fuse element, can't really see the number on it, kind of looks F0 (it is a surface mount fuse). I have fixed a couple of the flat screens by only replacing the fuse and checking and replacing any toasted caps. I was wondering if, these Toshiba laptops have that same type of failure. Thanks in advance, Markus Hi Markus... Which model number do you have? And is it a Satellite, or Satellite Pro? Ken |
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