Toshiba Satellite L505D-No Boot

[sparker1]

Toshiba Satellite L505D (LA-5332P). No life except for Power LED. Power LED is bright green. Have done the following:

* Replaced BIOS chip and re-programmed it
* Reflowed Southbridge
* Reflowed Northbridge
* Tried a different processor

Checked for some voltages (without CPU or Ram) eg.

* Found 19v at PQ22 on pins 5,6,7,8
* BIOS chip has these voltages pin 1: 0.14v, pin 2: 0.55v pin 3: 3.3v, pin 5 and 6: 3.3v, pin 7: 1.52v and pin 8: 0.13v
* Q35 has +5VALW on pins5,6,7,8 but no volts on pins 1-4 (thought pins 1-3 should have +5VS?)
* Found +3v and +5v at several other points (Where is best place to look for these voltages?).
* KBC has +3v at pins 9, 22, and 33 and at test point.

As usual I am stumped at what I should check next. Any ideas would be appreciated.

[Francisco.s]

Re: Toshiba Satellite L505D-No Boot

Recheck bios chip pin 8, should be 3.3v.

[sparker1]

Re: Toshiba Satellite L505D-No Boot

My mistake. I seem to have got a couple of pins mixed up.
pin 1=0.14v (same as above)
pin2 =0.56v (same as above)
pin3 =3.3v (same)
pin4 =0v (ground)
pin5 =0.13v (correction)
pin6 =1.5v (correction)
pin7 =3.3v (correction)
pin8 =3.3v (correction)

Well spotted Francisco.s and thanks for having a look. I am thinking about replacing the Northbridge. I see others have this problem but a reflow didn't help. Any ideas?

[sparker1]

Re: Toshiba Satellite L505D-No Boot

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