Lenovo G460 slow even in bios

[lezsimply]

Good day. I don't know where to start from but this laptop shows sluggish performance even in bios. Its like in slow motion. Hard drive is not the culprit because I have used good working ones. I also tried to boot off hiren's bcd without hard drive installed same situation.

It does not freeze or shutdown just in plain slow motion. Checked core voltage measures 1.2v stable. It has an i3-330m processor. I tried to use i3-350m but does not show display although its working on other board. What do you think guys? Thanks

[ktmmotocross]

Re: Lenovo G460 slow even in bios

i have this problem but with old processor. when its overheated something in it burn/l2,l3 cache/ and processor slows down.

[lezsimply]

Re: Lenovo G460 slow even in bios

I'll try to replace tantalum caps found underneath socket. I also observed that heatsink is very clogged. Haven't removed the board from case but tomorrow I'll try. Thanks ktm

[highpulse]

Re: Lenovo G460 slow even in bios

you should first chek wich temp you achieve on the cpu area , use a good OMEGA temp reader, the most tin one is the more accurate put it right on the die , and use a termal pad , to avoid making to much pressue on the die , just make sure you dont force to much when screwing dont forget with a pad it will make more pressure , so screw like 2/3 . and chek temp you're getting .

[lezsimply]

Re: Lenovo G460 slow even in bios

Dont have that kind of device as of now. But I managed to get few readings from software which indicates 52c upon startup. These are based on hwinfo, hardwaremonitor and siw. Some say it maybe from damaged sensors. Better test with a known good processor to eliminate it as the problem. thanks high

[tomodachi]

Re: Lenovo G460 slow even in bios

Sounds like corrupted BIOS .
I suggest you to flash the BIOS with original one, happened me at a Lenovo netbook and I fixed it with reflashing.

[lezsimply]

Re: Lenovo G460 slow even in bios

Ok I will try that. Thanks tomo.

[highpulse]

Re: Lenovo G460 slow even in bios

yes as tomodachi alto stated , if a flash with incorrect ME region will make this things to happen .

[smali]

Re: Lenovo G460 slow even in bios

@Lezsimply what are the updates of your fault.
is it tace out? have you tried another processor.

[claudyu07]

Re: Lenovo G460 slow even in bios

As other guys recommended check for CPU temp.
Faulty ram module can give same simptoms.
You can use memtest from bootable CD/USB and see

[lezsimply]

Re: Lenovo G460 slow even in bios

I have done all basic to advance test before posting here. I still can't test other processor as it seems to not boot when using other processor. I haven't found a good working bios as of now. will soon update you guys. Thanks very much.

[tushiwarashi]

Re: Lenovo G460 slow even in bios

heyy guysss whats the update on this thread? i also have the same problem sir lez... lenovo g460 with i3 m370... also lagging on bios... tried upating the bios still the same... tried cleaning and applying thermals paste and cleaning the fans etc... i notice it starts to slow down when i play videos... tried tinkering this laptop like 5x now still the same... its working fine on browsing but when i play games and videos is slowing down... i tried alot like replacing rams... reinstalling a windows xp windows7 both 32 and 64 still friggin the same... and asides... the wifi and the lan devices cannot be detected so im using a wifi usb stick for it to work...

sir lez can you add me on fb? ur from bulacan and just from nueva ecija...

[HarryPK]

Re: Lenovo G460 slow even in bios

Is the prob fixed? Please share

[RJARRRPCGP]

Re: Lenovo G460 slow even in bios

The slowness sounds just like a disabled L1 cache on old school processors.

[Neil_from_wales]

Re: Lenovo G460 slow even in bios

Have you done the obvious things - (clean out fan & heatsink, apply fresh thermal paste/pads to cpu & gpu, set bios to "setup defaults" or "fail safe")?

Also, if you disconnect everything (battery, hard drive, USB board, keyboard, wifi, bluetooth, DVD etc etc & all ram except one stick) - does it still run slow in bios? Check it with each individual ram stick.

My bet is the gpu is at fault. What temps does HWINFO give for gpu at startup?

[lezsimply]

Re: Lenovo G460 slow even in bios

I haven't fix the issue on this laptop. Got a lot of other boards to fix. I still got no go on bios file. If bios flash fail might as well be a gpu or sb, dont you think so?

[looofy]

Re: Lenovo G460 slow even in bios

its a processor issue
did you test its processor in other main board ?
did you make sure the processor socket is clean ?
dose the main board work with any ram slot (single ram) ?

[manu de hanoi]

Re: Lenovo G460 slow even in bios

I found out the issues:
1)CPU overheat: the fan finns clog very easily, remove the whole heat pipe assembly (by unscrewin around CPU & GPU), and thoroughly clean between the fins
2) GPU overheat (causing CPU to run at half speed when GPU over 80C and killing the system above 100 or so): There was a f*@#$ silicon pad between GPU and heat pipe (grey soft thing),I believe it was there to adjust the height because GPU was too far for copper heatsink. THE FIX: carefully bend down the wings (while keeping pressure on the copper rivets so that the wings dont detach) that connect the GPU heatink to the screw hole so that when screwed the heatsink presses downward one milimeter further

[manu de hanoi]

Re: Lenovo G460 slow even in bios

I found out the issues:
1)CPU overheat: the fan finns clog very easily

I meant the heat pipe fins near the fan