L300 NEC TOKIN ??????? help please

[gcomputers]

Hi i have this satellite l300 power up 3 sec after restart again and stay on but no image on screen , i have a doubt that :

Nec tokin problem , replaced with 4 x330u tantalium ,no change

i checked coils have 3,3v have 5v , and coil of Cpu 0,95V
CPU stay cool replaced cpu with the same model , no change

replaced with other model now have 1,2v on coil and the cpu make too hot ,

flashed bios , reflowed chipset , NO CHANGE , TURN ON 3 SEC AFTER RESTART AND STAY POWER ON ......................BUT NO SCREEN............................

any suggestion please

[gcomputers]

Re: L300 NEC TOKIN ??????? help please

Any other idea what can i do?

[LP_tekh]

Re: L300 NEC TOKIN ??????? help please

Put 2 more caps, this kind is low in farad, and if i use this kind, i put 6pcs.
I'm using the yellow type, is better than the one you got there.

[ktmmotocross]

Re: L300 NEC TOKIN ??????? help please

reflow nb

[gcomputers]

Re: L300 NEC TOKIN ??????? help please

reflow nb

reflowed but no change , i try too with 6x330 tantalium but the same .....

[Am0rPHiA]

Re: L300 NEC TOKIN ??????? help please

i have a motherboard L300 with the same symptoms , it powers on, does a restart and then sometimes it stays on or restarts again but with no post, i already replaced TOKIN with 6 x 330 tantalum, any ideas?

[highpulse]

Re: L300 NEC TOKIN ??????? help please

no ... im not sure i must chek one spare board here , but your nec specially the bottom one from the right side , is solder is between ground and positive (attention im not saying it is , but it looks like . and also if cpu is getting to hot , you gave to much heat on this area for a long perior of time .

my advise
remove all capacitors again
cleam board
and add only a pinch of solder on each contact of the capacitor ,

[highpulse]

Re: L300 NEC TOKIN ??????? help please

LP-TEKH using 6 is a wast of money and time ... 4 is more than enough for the job !