Well, usually Mechanical Keyboards from established brand ranges from 399 upwards. If you can get one for cheaper, then I do think it's a nice price. My brother bought his Corsair Strafe for 399.

for mkbs, it's better for you go and try out different switches first. it's really about personal preference.

i only have mkbs with cherry mx (red mostly; backlit and non-backlit); to me cherry mx blue is loud. red is best (linear, 45g), especially with double o-rings, and swapped stock abs keycaps with pbt. i prefer tenkeyless (tkl) to full set. if you are like those who love to swap keycaps due to whatever reasons, it's better to stick to cherry mx switches (more keycap choices). the common ones that fit all bills that i know of are filco (non-backlit), ducky (backlit and non-backlit), and coolermaster masterkeys series (backlit). corsair's mkbs have incompatible bottom row, so you cannot swap all of them with the common oem or cherry mx compatible keycaps (most will fit, but not some keys at bottom row; i read corsair will release pbt keycaps later, but don't know when)

there are cheaper options with cherry mx clone switches. you can check out storeuni.com or garage sales here for options. i saw something in those places that are around your budget.

edit: oh right my current favorite is coolermaster masterkey pro s. it's a minimalist keyboard with rgb backlit; you can save profiles with keyboard itself, without the need of additional software; media keys can be accessed via fn combos; the rest is for you to explore. yeah the price is higher, but it's worth the price tbh.

imo corsair's stock keycaps are bad. their overall build quality is good, except for their keycaps. the paint is so thin that they got peeled after a year or two.

you get o-rings separately, https://forum.lowyat.net/topic/3461701 (however i suggest you test the mkb out without o-rings first; maybe you like the original feels; i like my keyboards to make less noise)

i suggest you to get one. mkbs are good and long lasting in general (at least cherry mx switches). if you don't like backlit, it's cheaper relatively.

tbh there is no need to get those expensive ones, unless they have unique features that you want and that others don't have, or you're some kind of enthusiasts (which have their own sets of brands to choose from). in reality, they're keyboards that last and with better typing feels. (each brand does have different typing feels even if they use the same switch; but that's not the point if you just need a mkb)

right it's all about personal preference, that's why it's better to check them out one by one.

yeah it's almost all about personal preference when you talked about those switches. all it matters is that you like your choice

It is a module, just send to service centre to replace it if still under warranty. Else they will charge you part and labour fee.

Nice, I believe it would work with other soft touch plastic surfaces? My old Razer Abyssus clearly needs help.
You can try asking laptop repair shops for it, they usually can manage to find one. Else, you can DIY by buying the item from online store and replace it on your own.
I asked previously to a laptop repair shop, regarding display replacement. He mentioned it should be plug and play as the dimension is standard. Personally, I never changed it, but was always interested to replace the TN panel of my recently dead notebook.

what's the wear level of the battery? you can use hwinfo64 to check it out. also, did you service your laptop before? if possible, try tear it down and do cleanups also.

my old g55vw still work fine until now. (the battery is not so it only run when plugged in)

Only happen while using battery? If so, maybe only the battery is defective.

i kinda pissoff my ROG now, it cant detect my m2 ssd....  250gb ssd gonna be wasted.. feel want to sell this ROG.. my 4th ROG i bought..

which rog g-series? which ssd? have you tried ask in rog forum? usually better answers and response can be found there.
ok. how long is the laptop with you already? if it's more than 2 years usually the battery is dead.

u seems really knowledgeable at this. Do dongle WiFi naturally sucks compared to internal WiFi ?

im using TP-Link WN725N which is capable of getting 150Mbps. my internet plan is only 10Mbps at 2.4GHz. i know this dongle is small (antenna-wise), but compared to its capability vs my internet plan the difference is very noticable in terms of speed and latency vs my internal card. if i buy more expensive dongle (say, TP-Link archer T2U AC600) (also, does high gain vs standard gain matter?) will it at least be better than the internal, 5 years-old-Intel N2230 ?

Isn't the backlight integrated within the screen part? If you bought a new screen, it should come with the backlight together right? Anyway, you can try ask Hasoob Laptop Service if they could help with the issue.

You can message the shop first and ask them the price, after you mentioned your issue. Maybe their answer could help you to make decision better to sell or keep and repair.